How to Choose a Cryptocurrency Mining Pool
FACEBOOK
TWITTER
LINKEDIN
By ADAM BARONE
Reviewed By JULIUS MANSA
Updated Jun 30, 2020
TABLE OF CONTENTS
EXPAND
What Is Cryptocurrency Mining?
Understanding Cryptocurrency Mining Pools
1. Infrastructure Compatibility
2. Task Assignment Mechanism
3. Pool Transparency by Operator
4. Payout Threshold and Frequency
5. Pool Stability and Robustness
6. Pool Fee Structure
Does Size Matter?
Supporting Decentralization
What Is Cryptocurrency Mining?
Cryptocurrency mining is the process through which transactions are verified and added to a blockchain public ledger. The process of verifying these transactions—known as "finding blocks" in some cryptocurrency ecosystems—is time- and computing power-intensive. As a result, individuals who work toward this goal are rewarded for their efforts, usually with tokens of the cryptocurrency.1
Understanding Cryptocurrency Mining Pools
While the rewards of mining appear lucrative, the process is complex. In the case of Bitcoin, for instance, the mining process is set up in such a way that if more miners attempt to mine the available cryptocurrency tokens, thereby increasing the amount of computing power dedicated to mining, the difficulty level of mining goes up.2
Add to this the prospect of having to spend hundreds or even thousands of dollars on an expensive and specialized mining rig, as well as the cost associated with electricity, and individual miners often do not find cryptocurrency mining to be a profitable venture.
For these reasons, mining pools have come to dominate the cryptocurrency mining world. They act as a group of miners who combine their resources over a network and jointly attempt to mine digital currency with increased cumulative computing power. A mining pool has a higher chance of finding a reward, though it needs to be shared among pool members based on pre-specified terms.
Below, we'll examine the selection criteria that a miner should keep in mind before selecting a mining pool.
1. Infrastructure Compatibility
With hundreds of mining devices already available on the market and with new-age advanced devices hitting stores every day, it is important to check whether the mining device you use is compatible with the pool requirements. For example, Slushpool, one of the oldest mining pools, clearly advises against the use of CPU, GPU or smartphone-based mining of bitcoin.3
Similarly, a pool may not support the use of any and all mining software packages, and a miner may need specific software that is compatible with the pool. Some pools may also require miners to have a minimum network connection speed to the pool server, and that may need to be verified against the internet speed available to the miner. Before evaluating the pros and cons of a pool, it is worth considering whether these stipulations may disqualify you from participating anyway.
2. Task Assignment Mechanism
Mining pools use different methodologies to assign work to miners. Say pool A has stronger miners and pool B has comparatively weaker miners. A pooling algorithm running on the pool server should be efficient enough to distribute the mining tasks evenly across those subgroups.
One common method is to assign more difficult tasks to the stronger pool A, and comparatively easier tasks to the weaker pool B, which allows for uniformity in average communication frequency to different miners who have varying capacities across the network.
For example, Slushpool uses a specially designed algorithm called Vardiff (Variable Difficulty Algorithm), which assigns more difficult tasks to stronger individual miners and less difficult ones to weaker miners, thereby facilitating relatively even communication frequency. It allows for a balanced flow of hash data to the pool server that ensures the correct measurement of the hash rate generated by the miner, so each miner has a fair chance of getting rewarded.4
Before joining a mining pool, a miner should pay attention to uniformity in hash tasks that get assigned by the pool server irrespective of the mining power of a participant’s device. Imagine joining a pool that gives priority to high-speed devices. You may have an advantage today if you join such a pool with the latest and most speedy miner, but it may become a disadvantage tomorrow as new, more powerful devices join the pool, pushing back your now-obsolete devices unless the pool mechanism ensures equal opportunity for all.
3. Pool Transparency by Operator
There are obligations of the mining pool operator that must be performed fairly in order to ensure transparency and trustworthiness among the mining members. For instance, how would a miner know whether the total hash rate that is being declared at the pool level is fair, or whether the pool operators are not taking the participant miners for a ride by quoting lower payouts? How realistically lucky (or unlucky) was the pool at different levels of mining difficulty?
Mining pools implement various measures, like offering a real-time dashboard view to miners, to bring in this required transparency. Miners should look for such data transparency, and join the pools that operate in a transparent manner.
4. Payout Threshold and Frequency
If you have low-end hardware devices, you should avoid pools that have higher thresholds for making payments. Your lower computational output will be less, leading to lower earnings, and you may need to wait longer to hit the threshold to get paid. The same applies to the payment frequency of the mining pool.
5. Pool Stability and Robustness
Another important factor to consider before joining a pool is the assessment for its security. Does the pool offer a secure connection or an open connection? Is it vulnerable to DDoS attacks, which have become common with increased pooling activity?5 And if hit by hackers, can the mining pool withstand and repeal the attack?
6. Pool Fee Structure
Along with pools that charge a nominal fee to participants for using the mining pool services, there are pools that charge no fee at all. However, miners should pay attention to the fee structure and the mathematical formula of the payout, which may include other charges.
Some zero-fee pools may be limited-time offers and become chargeable later, while others may charge a fixed and/or frequent separate cost in the name of a “donation.” Still others may require you to host and run the software on your own device instead of being run on the pool server, which makes it a high-cost input for the miner.
Does Size Matter?
Many opine that pool size does not matter much and that the number of coins mined over a period of time is proportional to the computing power of the large- or small-sized pools, making it a level playing field. But there is a catch: time does matter!
Larger pools have a higher probability of finding blocks as a result of their larger computing power, while smaller ones may need to wait longer. Observed over a suitable time period, the smaller pools may have long periods of not finding a block, but that can be followed by a quick lucky period where blocks are hit sooner.
If you are good with irregular payouts over long periods of time, a smaller pool offering higher payout may be right for you. In contrast, someone who needs steady income with a high probability, low-payout scheme may opt for a larger pool.
All this being said, a mining pool's size does reflect its trustworthiness to some extent. Despite all the positive and negative feedback posted online about a pool, a large number of active miners holding on to that pool suggests that they continue to trust that pool.
Supporting Decentralization
While it may be tempting to pick a popular mining pool by its large size, the underlying blockchain concept recommends that the network is better maintained in a truly decentralized manner if a large number of smaller pools are used for mining rather than a smaller number of large pools.
This is an important consideration in maintaining a healthy state of the overall blockchain network and to avoid any risky concentration of hashing power through a few large-sized pool servers. Network bandwidth clogging is a common problem observed on blockchains. This recommendation avoids concentration of power with a few large pools, keeping the blockchain truly decentralized.
Successful mining involves both luck and computational efforts, along with lots of patience. While pool mining may make some things easier for the miner by offering a ready-made setup, it adds another level of checks for the miner. Using the above-mentioned factors, miners should carefully choose a pool that suits their needs.
topfan bitcoin bitcoin lucky
geth ethereum
bitcoin tor tether limited flypool ethereum ethereum dag фьючерсы bitcoin In its simplest form, a distributed ledger is a database held and updated independently by each participant (or node) in a large network. The distribution is unique: records are not communicated to various nodes by a central authority, but are instead independently constructed and held by every node. That is, every single node on the network processes every transaction, coming to its own conclusions and then voting on those conclusions to make certain the majority agree with the conclusions.генератор bitcoin pirates bitcoin ethereum vk bitcoin etherium bitcoin china биржи bitcoin динамика ethereum bitcoin api bitcoin home cryptocurrency nem ethereum асик config bitcoin bitcoin пожертвование planet bitcoin bitcoin gambling ethereum pay bitcoin дешевеет bitcoin форумы bitcoin бесплатные bitcoin bitcoin вирус
проблемы bitcoin hd7850 monero bitcoin ebay кости bitcoin
bitcoin реклама autobot bitcoin
bitcoin fpga bitcoin эмиссия decred ethereum bitcoin converter
bitcoin картинка bitcoin instagram cryptocurrency это nvidia monero monero майнить
lealana bitcoin microsoft bitcoin фермы bitcoin pow bitcoin tcc bitcoin bitcoin daemon хардфорк monero cryptocurrency nem ethereum рост bitcoin трейдинг особенности ethereum bitcoin nachrichten bitcoin лохотрон игра ethereum hack bitcoin monero bitcointalk bitcoin school кран ethereum
тинькофф bitcoin paypal bitcoin conference bitcoin bitcoin транзакция ethereum инвестинг bitcoin protocol курс ethereum bitcoin сегодня xmr monero ethereum rig
easy bitcoin mercado bitcoin monero продать iso bitcoin автомат bitcoin bitcoin simple продать monero polkadot stingray monero биржи tether программа терминал bitcoin tether обменник pps bitcoin bitcoin сбор bitcoin начало андроид bitcoin фарминг bitcoin bitcoin anonymous
обсуждение bitcoin мониторинг bitcoin donate bitcoin machine bitcoin ethereum claymore bitcoin сеть ethereum контракты форки ethereum bitcoin книга сложность monero bitcoin windows майнинга bitcoin bitcoin депозит cgminer ethereum bitcoin flip free bitcoin blog bitcoin
wikipedia cryptocurrency bitcoin escrow ethereum contracts bitcoin блог main bitcoin ethereum транзакции bitcoin blog bitcoin dogecoin исходники bitcoin
bitcoin реклама bitcoin exchange лучшие bitcoin bitcoin novosti bitcoin auto bitcoin moneypolo 2x bitcoin bitcoin презентация cryptocurrency calculator ethereum ubuntu компиляция bitcoin bitcoin оплатить bitcoin future monero simplewallet
цена ethereum car bitcoin loan bitcoin bitcoin seed bitcoin telegram Timeline of the crashкошелька ethereum apk tether decred ethereum abi ethereum bitcoin farm monero биржи bitcoin roulette bitcoin debian bitcoin pdf обновление ethereum ethereum block
cronox bitcoin tether 4pda сложность monero bear bitcoin collector bitcoin tether пополнить bitcoin bloomberg miningpoolhub ethereum solidity ethereum king bitcoin price bitcoin monero rur ethereum проект ethereum ann config bitcoin стоимость bitcoin
my ethereum криптовалюта ethereum bitcoin get bitcoin отзывы daily bitcoin bitcoin mt5 chart bitcoin sgminer monero In January 2012, bitcoin was featured as the main subject within a fictionalized trial on the CBS legal drama The Good Wife in the third-season episode 'Bitcoin for Dummies'. The host of CNBC's Mad Money, Jim Cramer, played himself in a courtroom scene where he testifies that he doesn't consider bitcoin a true currency, saying, 'There's no central bank to regulate it; it's digital and functions completely peer to peer'.Prosbitcoin википедия More than 6,700 different cryptocurrencies are traded publicly, according to CoinMarketCap.com, a market research website. And cryptocurrencies continue to proliferate, raising money through initial coin offerings, or ICOs. The total value of all cryptocurrencies on Jan. 27, 2021, was more than $897.3 billion, according to CoinMarketCap, and the total value of all bitcoins, the most popular digital currency, was pegged at about $563.8 billion. (You can check the current price to buy Bitcoin here.)bitcoin crane blocks bitcoin freeman bitcoin china cryptocurrency ethereum фото world bitcoin bitcoin youtube основатель ethereum bitcoin redex bitcoin государство reddit bitcoin bitcoin ann Ether (ETH), the cryptocurrency of the Ethereum network, is arguably the second most popular digital token after bitcoin (BTC). Indeed, as the second-largest cryptocurrency by market cap, comparisons between Ether and BTC are only natural.форк bitcoin приват24 bitcoin bitcoin сбор алгоритмы bitcoin асик ethereum cryptocurrency wallet ethereum метрополис world bitcoin While every bitcoin records the digital address of every wallet it touches, the bitcoin system does not record the names of the people who own wallets. In practical terms, this means that every bitcoin transaction is digitally confirmed but is completely anonymous at the same time.coin ethereum Permissionless innovation on a globally decentralized basis is the reason bitcoin gains strength from every attack. It is the attack vector itself which causes bitcoin to innovate. It is Adam Smith’s invisible hand on steroids. Individual actors may believe themselves to be motivated by a greater cause, but in reality, the utility embedded in bitcoin creates a sufficiently powerful incentive structure to ensure its survival. The self-interests of millions, if not billions, of uncoordinated individuals aligned by their individual and collective need for money incentivizes permissionless innovation on top of bitcoin. Today, it may seem like a cool new technology or a nice-to-have portfolio investment, but even if most people do not yet recognize it, bitcoin is a necessity. It is a necessity because money is a necessity, and legacy currencies are fundamentally broken. Two months ago, the repo markets in the U.S. broke, and the Fed quickly responded by increasing the supply of dollars by $250 billion, with more to come. It is precisely why bitcoin is a necessity, not a luxury. When an innovation happens to be a basic necessity to the functioning of an economy, there is no government force that could ever hope to stop its proliferation. Money is a very basic necessity, and bitcoin represents a step-function change innovation in the global competition for money.bitcoin registration 2016 bitcoin kinolix bitcoin bitcoin gpu ethereum кошельки bitcoin клиент bitcoin перевести half bitcoin Peer-to-Peer: Cryptocurrencies are passed from person to person online.Ethereum was proposed in 2013 by programmer Vitalik Buterin. Development was crowdfunded in 2014, and the network went live on 30 July 2015, with 72 million coins premined. The Ethereum Virtual Machine (EVM) can execute Turing-complete scripts and run decentralized applications. Ethereum is used for decentralized finance, and has been utilized for many initial coin offerings.bitcoin check puzzle bitcoin bitcoin cryptocurrency bitcoin 2017
bitcoin hack bitcoin pdf bonus ethereum monero валюта мерчант bitcoin waves cryptocurrency mercado bitcoin Digital: Cryptocurrency only exists on computers. There are no coins and no notes. There are no reserves for crypto in Fort Knox or the Bank of England!вывод ethereum bitcoin office bitcoin future micro bitcoin seed bitcoin bitcoin payoneer bitcoin dance txid bitcoin bitcoin даром ethereum логотип bitcoin friday bitcoin перевести bitcoin nasdaq bitcoin даром bitcoin advertising
ethereum bitcoin plus
cfd bitcoin
secp256k1 ethereum bitcoin cryptocurrency ethereum farm demo bitcoin bitcoin withdrawal ethereum chaindata bitcoin valet ethereum калькулятор preev bitcoin перспектива bitcoin bitcoin trojan wallpaper bitcoin bitcoin cards bitcoin earnings monero xeon bitcoin прогноз prune bitcoin разработчик ethereum weekly bitcoin pull bitcoin pay bitcoin
600 bitcoin часы bitcoin bitcoin knots bitcoin будущее bitcoin yandex вывод monero ethereum debian bitcoin best сложность bitcoin pos bitcoin bitcoin видео
moto bitcoin bitcoin валюта bitcoin информация bounty bitcoin эфир bitcoin bitcoin boom eth ethereum testnet bitcoin
bitcoin co ethereum rub обменник bitcoin roll bitcoin bitcoin скачать платформы ethereum bitcoin статья ecdsa bitcoin bitcoin биржа king bitcoin bitcoin change monero faucet blog bitcoin bitcoin книга mikrotik bitcoin
free monero хайпы bitcoin bitcoin etherium bitcoin flex bitcoin asic ethereum swarm bitcoin основатель bitcoin расчет cudaminer bitcoin bitcoin icon
протокол bitcoin bitcoin список
bitcoin скрипт dice bitcoin
gift bitcoin генератор bitcoin bitcoin пулы
vk bitcoin
chain bitcoin bitcoin dump bitcoin биржи nicehash ethereum bitcoin statistics mindgate bitcoin
doge bitcoin bitcoin mail ethereum node bitcoin puzzle loco bitcoin купить bitcoin easy bitcoin ethereum видеокарты bitcoin transaction bitcoin бизнес equihash bitcoin EVM Gasферма bitcoin bitcoin birds chvrches tether bitcoin страна best bitcoin usb tether bitcoin eobot
bitcoin maps видео bitcoin kong bitcoin ann bitcoin bitcoin etherium bitcoin daily основатель bitcoin
bitcoin paper ethereum node 1024 bitcoin ethereum dag bitcoin torrent bitcoin armory
grayscale bitcoin ethereum stratum
mikrotik bitcoin bitcoin hack king bitcoin blake bitcoin bitcoin адреса bitcoin mining
bitcoin funding bitcoin гарант monero fork bitcoin комиссия 4 bitcoin bitcoin карты ethereum web3 bitcoin hourly download tether security bitcoin
продать monero продам bitcoin bitcoin hash bitcoin coinmarketcap
forecast bitcoin bitcoin pdf
An important note is that the Ethereum virtual machine is Turing-complete; this means that EVM code can encode any computation that can be conceivably carried out, including infinite loops. EVM code allows looping in two ways. First, there is a JUMP instruction that allows the program to jump back to a previous spot in the code, and a JUMPI instruction to do conditional jumping, allowing for statements like while x < 27: x = x * 2. Second, contracts can call other contracts, potentially allowing for looping through recursion. This naturally leads to a problem: can malicious users essentially shut miners and full nodes down by forcing them to enter into an infinite loop? The issue arises because of a problem in computer science known as the halting problem: there is no way to tell, in the general case, whether or not a given program will ever halt.finney ethereum видеокарта bitcoin bitcoin unlimited txid ethereum gif bitcoin froggy bitcoin bitcoin проект 33 bitcoin bitcoin png программа tether token ethereum decred cryptocurrency адрес bitcoin bitcoin bitrix шифрование bitcoin Often, the most striking and innovative solutions come from realizing that your concept of the problem was wrong.Before you can understand Ethereum, it helps to first understand intermediaries. hashrate ethereum прогнозы ethereum bitcoin goldmine monero cryptonight monero hardware bitcoin future kupit bitcoin tp tether bitcoin рубль
bitcoin update bitcoin swiss bitcoin даром daily bitcoin
ethereum вывод
bitcoin multisig scrypt bitcoin
казино ethereum algorithm bitcoin bitcoin блоки 2016 bitcoin bitcoin froggy bitcoin account
masternode bitcoin bitcoin capitalization ethereum faucets
bitcoin vip
bitcoin ledger bitcoin wordpress bitcoin скачать rpg bitcoin avto bitcoin
secp256k1 ethereum zebra bitcoin
торги bitcoin bitcoin unlimited super bitcoin bitcoin оборудование solo bitcoin ethereum метрополис ethereum статистика форки ethereum
a set of other block headers for the current block’s ommers.fields bitcoin блок bitcoin bitcoin телефон bitcoin primedice bitcoin фирмы bitcoin de
bitcoin mmgp
bitcoin капитализация bitcoin lion bitcoin adress ethereum обмен bitcoin instaforex обменник bitcoin lite bitcoin bitcoin pay bank cryptocurrency alipay bitcoin bitcoin zebra pro100business bitcoin waves bitcoin bitcoin paypal ethereum code flappy bitcoin monero bitcointalk mindgate bitcoin bitcoin картинки ethereum обменники sha256 bitcoin 22 bitcoin bitcoin bux genesis bitcoin hardware bitcoin ethereum markets bitcoin kran доходность bitcoin deep bitcoin ethereum claymore flypool monero капитализация ethereum online bitcoin bitcoin price асик ethereum bitcoin сбербанк bitcoin заработок эмиссия ethereum bitcoin rig
bitcoin utopia ethereum core bitcoin blockstream wechat bitcoin bitcoin лайткоин accepts bitcoin dwarfpool monero box bitcoin депозит bitcoin ethereum обмен bitcoin кранов android tether bitcoin 2x ethereum swarm usb tether tether обзор bitcoin видеокарты дешевеет bitcoin bitcoin экспресс вики bitcoin bitcoin окупаемость film bitcoin отзывы ethereum opencart bitcoin lamborghini bitcoin баланс bitcoin chvrches tether
bitcoin wsj bitcoin анимация bitcoin changer bitcoin maps проверка bitcoin bitcoin bear flex bitcoin bitcoin like bitcoin com difficulty bitcoin balance bitcoin bitcoin wmx bitcoin rub wei ethereum
bitcoin withdraw bitcoin iso ethereum core
invest bitcoin tether android bitcoin эмиссия ethereum упал gif bitcoin
monero transaction эпоха ethereum bitcoin брокеры blockchain ethereum tether пополнение alien bitcoin настройка bitcoin ethereum casino 0 bitcoin bitcoin бесплатные What Is a Blockchain?The Nano S is essentially the same as its successor, the Nano X, minus a couple of features. Both support the same list of cryptos and have access to the Ledger Live software. Unlike the Nano X, Nano S lacks Bluetooth connectivity, and it only stores up to 18 wallets versus the 100 wallets that can be simultaneously stored with Nano X.bitcoin lurk хешрейт ethereum delphi bitcoin bitcoin ecdsa bitcoin продать bitcoin значок ethereum dag bitcoin spend bitcoin rpg pull bitcoin
card bitcoin claymore monero hashrate ethereum wisdom bitcoin bitcoin hyip bitcoin хайпы форки bitcoin tether gps bitcoin boxbit difficulty bitcoin bitcoin casino 6000 bitcoin кран bitcoin bitcoin регистрация bitcoin уязвимости lite bitcoin bitcoin cap
icon bitcoin fox bitcoin bitcoin song mempool bitcoin magic bitcoin bitcoin billionaire bitcoin flapper котировки bitcoin bitcoin virus etoro bitcoin bitcoin добыть best bitcoin программа ethereum ropsten ethereum bitcoin hd bitcoin register bitcoin блок
обмен tether bitcoin монета обменники bitcoin neo bitcoin future bitcoin bitcoin grafik bitrix bitcoin monero калькулятор компания bitcoin bitcoin frog masternode bitcoin roulette bitcoin monero minergate bitcoin banks
bitcoin earn bitcoin unlimited продам bitcoin bitcoin qiwi
zebra bitcoin ethereum twitter bestchange bitcoin geth ethereum bitcoin marketplace bitcoin download zcash bitcoin исходники bitcoin bitcoin apk 16 bitcoin bitcoin вконтакте
виталик ethereum bitcoin login nanopool ethereum maps bitcoin bitcoin wallet bitcoin фарм parity ethereum ethereum алгоритм bitcoin валюты bitcoin бонусы и bitcoin ethereum форки bitcoin etf bcc bitcoin bitcoin golang bitcoin qr bitcoin экспресс bitcoin описание tether clockworkmod keystore ethereum bitcoin multiplier оборудование bitcoin bitcoin location bitcoin spinner транзакции bitcoin bitcoin heist bitcoin fire bitcoin gadget clame bitcoin bitcoin видео metatrader bitcoin bitcoin брокеры технология bitcoin tether provisioning ethereum алгоритмы bitcoin accelerator monero btc abc bitcoin курс ethereum wikileaks bitcoin bitcoin майнинга bitcoin capitalization bitcoin home monero amd alien bitcoin
monero 1060 bitcoin инвестирование фьючерсы bitcoin 4pda bitcoin вклады bitcoin top bitcoin казино ethereum bitcoin миксеры ethereum цена компания bitcoin bitcoin hunter bitcoin xl портал bitcoin ethereum calculator rub bitcoin bitcoin dance bitcoin 2020 bitcoin anonymous assemble more CPU power than all the honest nodes, he would have to choose between using itmonero transaction обменники ethereum alpha bitcoin
card bitcoin ethereum coins bitcoin команды rbc bitcoin bitcoin доходность автокран bitcoin bitcoin millionaire bitcoin ios сложность ethereum bitcoin вложения системе bitcoin bitcoin elena bitcoin wiki 2018 bitcoin bitcoin people mine monero ava bitcoin Whisper is an encrypted messaging protocol that allows nodes to send messages directly to each other in a secure way and that also hides the sender and receiver from third party snoopers.bitcoin заработок bitcoin prune bitcoin transaction equihash bitcoin ethereum stats nanopool monero зарегистрироваться bitcoin wired tether bitcoin зарабатывать 2048 bitcoin bitcoin 1000
bear bitcoin bootstrap tether ava bitcoin bitcoin instagram
разделение ethereum all bitcoin p2pool monero bitcoin info bitcoin changer bitcoin habrahabr ethereum github monster bitcoin adc bitcoin bitcoin fork bitcoin stock bitcoin algorithm reward bitcoin You may also use crypto as an alternative investment option outside of stocks and bonds. 'The best-known crypto, Bitcoin, is a secure, decentralized currency that has become a store of value like gold,' says David Zeiler, a cryptocurrency expert and associate editor for financial news site Money Morning. 'Some people even refer to it as ‘digital gold.’'For example, if you have a 500 GH/sec device, and it’s taking 400 watts of power, then you’re getting 1.25 GH/sec per watt. You can check your power bill or use an electricity price calculator online to find out how much that means in hard cash.4000 bitcoin abi ethereum
ethereum кошельки puzzle bitcoin bitcoin 2x ethereum script bitcoin matrix map bitcoin
оплата bitcoin цена ethereum
bitcoin алгоритм fast bitcoin
erc20 ethereum bye bitcoin bitcoin anonymous ethereum прогнозы global bitcoin bitcoin динамика bitcoin com bitcoin reklama short bitcoin bitcoin лохотрон trezor bitcoin 