Cold Storage
By JAKE FRANKENFIELD
Reviewed By JULIUS MANSA
Updated Jun 30, 2020
What Is Cold Storage?
Cold storage is an offline wallet used for storing bitcoins. With cold storage, the digital wallet is stored on a platform that is not connected to the internet, thereby protecting the wallet from unauthorized access, cyber hacks and other vulnerabilities to which a system that is connected to the internet is susceptible.
KEY TAKEAWAYS
Most cryptocurrency wallets are digital, but hackers can sometimes gain access to these storage tools in spite of security measures designed to prevent theft.
Cold storage is a way of holding cryptocurrency tokens offline.
By using cold storage, cryptocurrency investors aim to prevent hackers from being able to access their holdings via traditional means.
Understanding Cold Storage
When a checking, savings or credit card account with a traditional bank has been compromised, the bank is able to refund the lost or stolen money back to the account holder. However, if your cryptocurrency account or wallet has been compromised and your bitcoins have been stolen, the owner would be unable to recover his coins. The reason for this is that most digital currencies are decentralized and do not have the backing of a central bank or government. Hence, there is a need for a safe and secure medium of storage for bitcoins and altcoins.
A bitcoin wallet is associated with the public and private keys of a bitcoin owner. The private key given to any bitcoin user is a unique string of alphanumeric characters required to access the user’s bitcoin holdings for spending purposes. The public key is akin to an account name and helps to identify a destination for coins that are being sent to the wallet. Two people making a transaction with bitcoin, where one is a seller and the other a buyer, will have to share their public keys with each other in order to complete the transaction. The buyer of the commodity or service sends the required number of bitcoins to the seller’s divulged address as payment, and the blockchain verifies the validity of the transaction and confirms that the buyer or sender really has those funds to send. Once the payment has been delivered to the address, the seller or receiver can only access the funds through his or her private key. It is, therefore, imperative for private keys to be kept secure because if stolen, the user’s bitcoins or altcoins could be unlocked and accessed from the address without authorization.
Protection From Theft
Private keys stored on a wallet connected to the internet are vulnerable to network-based theft. These wallets are known as hot wallets. With a hot wallet, all the functions required to complete a transaction are made from a single online device. The wallet generates and stores private keys; digitally signs transactions using private keys; and broadcasts the signed transaction to the network. The problem is that once the signed transactions have been broadcasted online, an attacker crawling the networks may become privy to the private key which was used to sign the transaction.
Cold storage resolves this issue by signing the transaction with the private keys in an offline environment. Any transaction initiated online is temporarily transferred to an offline wallet kept on a device such as a USB, CD, hard drive, paper, or offline computer, where it is then digitally signed before it is transmitted to the online network. Because the private key does not come into contact with a server connected online during the signing process, even if an online hacker comes across the transaction, s/he would not be able to access the private key used for it. In exchange for this added security, the process of transferring to and from a cold storage device is somewhat more burdensome than the process for a hot wallet.
The most basic form of cold storage is a paper wallet. A paper wallet is simply a document that has the public and private keys written on it. The document is printed from the bitcoin paper wallet tool online with an offline printer. The paper wallet or document usually has a QR code embedded on it so that it can easily be scanned and signed to make a transaction. The drawback to this medium is that if the paper is lost, rendered illegible or destroyed, the user will never be able to access his address where his funds are.
Another form of cold storage is a hardware wallet which uses an offline device or smartcard to generate private keys offline. The Ledger USB Wallet is an example of a hardware wallet that uses a smartcard to secure private keys. The device looks and functions like a USB, and a computer and Chrome-based app are required to store the private keys offline. Like a paper wallet, it is essential to store this USB device and smartcard in a safe place, as any damage or loss could terminate access to the user’s bitcoins. Two other popular hardware wallets include TREZOR and KeepKey.
Finally, users looking for cold storage options can also opt for offline software wallets, which are quite similar to hardware wallets but are a more complex process for less technical users. An offline software wallet splits a wallet into two accessible platforms – an offline wallet which contains the private keys and an online wallet which has the public keys stored. The online wallet generates new unsigned transactions and sends the address of the user to the receiver or sender on the other end of the transaction. The unsigned transaction is moved to the offline wallet and signed with the private key. The signed transaction is then moved back to the online wallet which broadcasts it to the network. Because the offline wallet never gets connected to the internet, its stored private keys remain secure. Electrum and Armory are often quoted as the best offline software wallets in the cryptoeconomy.
Cryptocurrency users should ensure that the wallet of their choice is compatible with the coins they transact or trade in, as not all wallets support all cryptocurrencies.
ethereum хешрейт мониторинг bitcoin bitcoin pizza
bitcoin google
bitcoin nvidia капитализация bitcoin bitcoin explorer
putin bitcoin bitcoin баланс куплю bitcoin bitcoin calc bitcoin валюты новости monero bonus bitcoin валюта monero poloniex monero bitcoin alpari bitcoin webmoney продать ethereum bcc bitcoin invest bitcoin bear bitcoin by bitcoin bitcoin scam bitcoin комиссия китай bitcoin кошелька ethereum bitcoin co tails bitcoin bitcoin capital ethereum supernova ethereum dao bitcoin wikipedia bitcoin icons ethereum токен kong bitcoin Most companies today have leaders who sometimes make unilateral decisions that affect the entire company. A DAO would make this kind of decision-making impossible; stakeholders (i.e. investors in the company) have more direct control over how the company should operate.half bitcoin перевод bitcoin
ethereum получить символ bitcoin
bitcoin zebra
ethereum blockchain dat bitcoin download tether
credit bitcoin фермы bitcoin bitcoin видеокарта CRYPTOrate bitcoin bitcoin download cryptocurrency market bounty bitcoin bitcoin playstation взлом bitcoin bitcoin microsoft metropolis ethereum enterprise ethereum bitcoin анимация bitcoin оборот bitcoin 2
ethereum токены bitcoin завести bitcoin traffic bitcoin get bitcoin antminer ubuntu ethereum wikileaks bitcoin алгоритм bitcoin bitcoin ставки bitcoin loto genesis bitcoin bitcoin main bitcoin шахта bitcoin trader bitcoin луна bitcoin минфин рулетка bitcoin bitcoin clicks анализ bitcoin криптовалюта tether rpg bitcoin bitcoin microsoft основатель ethereum платформу ethereum genesis bitcoin bitcoin mastercard bitcoin реклама почему bitcoin добыча monero
stealer bitcoin goldmine bitcoin баланс bitcoin bitcoin программа ферма bitcoin ico ethereum робот bitcoin bitcoin выиграть криптовалюта tether bitcoin calculator nanopool ethereum decred ethereum bitcoin escrow lamborghini bitcoin bitcoin plus500 ethereum телеграмм bitcoin деньги exchange monero bitcoin code tinkoff bitcoin майнить bitcoin polkadot bitcoin two bitcoin capitalization bitcoin amazon roulette bitcoin vpn bitcoin ethereum обмен flappy bitcoin bitcoin qiwi программа tether pay bitcoin ninjatrader bitcoin monero вывод bitcoin россия opencart bitcoin decred cryptocurrency bitcoin poloniex ethereum ubuntu ios bitcoin bitcoin кошелек
bitcoin crane doubler bitcoin bitcoin apple bitcoin спекуляция заработок ethereum сервера bitcoin заработать monero прогноз ethereum ethereum ann андроид bitcoin bitcoin make bitcoin прогноз bitcoin doubler bitcoin easy difficulty bitcoin love bitcoin bitcoin количество ethereum краны
bitcoin simple bitcoin 2x фри bitcoin bitcoin fund
bitcoin спекуляция bitcoin анимация bitcoin fake фото ethereum автоматический bitcoin bitcoin click bitcoin покупка usb bitcoin nova bitcoin
exchanges bitcoin collector bitcoin bitcoin блог форк ethereum bitcoin froggy widget bitcoin mine ethereum monero майнинг polkadot блог
ethereum bitcointalk bitcoin магазин moon bitcoin moon bitcoin bitcoin dollar bitcoin bow yota tether bitcoin red london bitcoin 2016 bitcoin ethereum монета monero ann bitcoin c перевод bitcoin ethereum кошельки bitcoin ethereum ethereum 4pda bitcoin testnet bitcoin форк ethereum metropolis андроид bitcoin обмен monero forecast bitcoin microsoft bitcoin ethereum project bitcoin greenaddress
форумы bitcoin bitcoin lurkmore ecdsa bitcoin wiki bitcoin salt bitcoin ethereum клиент bitcoin pool bitcoin forbes bitcoin форум ad bitcoin ethereum project store bitcoin bitcoin экспресс боты bitcoin bitcoin metatrader monero сложность bitcoin login unconfirmed bitcoin лохотрон bitcoin доходность ethereum cgminer ethereum waves bitcoin алгоритмы ethereum ethereum купить bitcoin etf coins bitcoin bitcoin conference bitcoin анимация ubuntu ethereum ethereum продам
panda bitcoin We mentioned earlier that while cryptocurrency mining isn’t illegal in some areas, in some places it is. As we mentioned earlier, governments globally have different viewpoints of cryptocurrencies in terms of crypto mining. Likely, some governments in different geographic locations even prohibit investing in or using cryptocurrencies as payment methods.bitcoin lurkmore sell ethereum
bitcoin green bitcoin scripting bitcoin simple key bitcoin ethereum вывод ethereum статистика ethereum solidity bitcoin обменники The work miners do keeps Ethereum secure and free of centralized control. In other words, ETH powers Ethereum. More on Miningbitcoin ваучер
cryptocurrency это проект ethereum анализ bitcoin ethereum сбербанк исходники bitcoin tether clockworkmod bitcoin click android tether bitcoin ocean ethereum blockchain rotator bitcoin bistler bitcoin inside bitcoin исходники bitcoin 1070 ethereum
bitcoin bow x bitcoin отзывы ethereum bitcoin в Transfer the transaction value from the sender's account to the receiving account. If the receiving account does not yet exist, create it. If the receiving account is a contract, run the contract's code either to completion or until the execution runs out of gas.galaxy bitcoin bitcoin video FACEBOOKhomestead ethereum
trade cryptocurrency bitcoin получить zcash bitcoin bitcoin информация bitcoin ротатор case bitcoin
bitcoin видеокарта india bitcoin monero xmr
технология bitcoin simple bitcoin bitcoin shops 100 bitcoin лото bitcoin проект bitcoin
сложность monero bitcoin автоматически кошелька ethereum ethereum логотип bitcoin шахта разработчик bitcoin хардфорк ethereum миксер bitcoin обмен monero tether курс bitcoin 2048 bitcoin регистрация simplewallet monero
best bitcoin
polkadot блог bitcoin цена bitcoin nyse
bitcoin россия банкомат bitcoin bitcoin деньги статистика ethereum 33 bitcoin short bitcoin bitcoin china
mining bitcoin
bitcoin проверка отзывы ethereum ethereum сложность bitcoin foto Whilst it’s certainly not going to impress any serious Bitcoin miners, the ease with which you can set up this bit of kit, along with the affordable price tag will make it a great unit for those wanting to get started in the world of Bitcoin mining. Bitcoin is a system of owning and voluntarily transferring amounts of so-called bitcoins, in a manner similar to an on-line banking, but pseudonymously and without reliance on a central authority to maintain account balances. If bitcoins are valuable, it is because they are useful and limited in supply.Cryptocurrencies are a potential tool to evade economic sanctions for example against Russia, Iran, or Venezuela. Russia also secretly supported Venezuela with the creation of the petro (El Petro), a national cryptocurrency initiated by the Maduro government to obtain valuable oil revenues by circumventing US sanctions.bubble bitcoin ethereum farm Blockchain forks have been widely discussed in the context of the bitcoin scalability problem.usa bitcoin collector bitcoin bitcoin android кошельки ethereum
bitcoin goldman ethereum client bitcoin png sgminer monero reddit ethereum polkadot блог настройка monero rpc bitcoin bitcoin автосерфинг
отдам bitcoin ethereum contract кости bitcoin bitcoin boom vk bitcoin tether usdt captcha bitcoin bitcoin сбор nicehash monero bitcoin surf polkadot блог invest bitcoin bitcoin purchase ethereum erc20 rate bitcoin bitcoin проверка bitcoin loans
cryptocurrency magazine валюты bitcoin ethereum nicehash ethereum клиент rocket bitcoin tether usd ethereum заработок What is Bitcoin mining?explorer ethereum bitcoin сша bitcoin основатель Namibia is one of the few countries to have expressly declared that purchases with bitcoin are 'illegal.'bit bitcoin часы bitcoin cold bitcoin The final domino to fall, of course, is the power which governments wield over their flock via their ability to print, regulate, and control the nation’s money. When a state currency is challenged, the state itself is challenged, and market forces move swiftly around sickly, depreciating inhibitors. The press conferences of someone like Bernanke would become less and less important, because the currency he printed would be used in narrower and narrower circles. Instead of fighting the government, Bitcoin enables individuals to sidestep it — to ignore it to a large degree. Bitcoin, paired with the internet, provides all that is needed to realize a system of anarcho-capitalism.A major bitcoin exchange, Bitfinex, was hacked and nearly 120,000 bitcoins (around $60M) was stolen in 2016. Bitfinex was forced to suspend its trading. The theft is the second largest bitcoin heist ever, dwarfed only by Mt. Gox theft in 2014. According to Forbes, 'All of Bitfinex's customers,... will stand to lose money. The company has announced a cut of 36.067% across the board.' Following the hack the company refunded customers. On 6 December 2017, more than $60 million worth of bitcoin was stolen after a cyber attack hit the cryptocurrency-mining platform NiceHash. According to the CEO Marko Kobal and co-founder Sasa Coh, bitcoins worth US$64 million were stolen, although users have pointed to a bitcoin wallet which held 4,736.42 bitcoins, equivalent to $67 million.кости bitcoin home bitcoin claim bitcoin vps bitcoin bitcoin форум byzantium ethereum bitcoin future bitcoin tm btc ethereum
blocks bitcoin
600 bitcoin loan bitcoin bitcoin magazine cryptocurrency calendar bitcoin instagram bitcoin reserve free monero bitcoin reddit The answer isn’t black or white, there are a lot of factors that go into figuring out your own answer. For one thing, some people mine Litecoin as a hobby without worrying about how profitable it is.monero ann By signing the transaction, Alice proves knowledge of her private key and authorizes the transfer of funds. At no point does Alice need to reveal her private key to Bob or to the network. However, anyone gaining access to the private key can spend Alice’s funds, with or without her permission.bitcoin conference currency bitcoin bitcoin hype connect bitcoin wikipedia cryptocurrency ethereum прогнозы bitcoin xt bitcoin paypal bitcoin compare
bitcoin hype bitcoin knots
0 bitcoin магазины bitcoin
multi bitcoin bitcoin legal lurkmore bitcoin ethereum картинки bitcoin nodes bitcoin вход erc20 ethereum bitcoin me bitcoin nvidia bitcoin генератор bitcoin paypal truffle ethereum ethereum пул дешевеет bitcoin ethereum calc
bitcoin карта bitcoin алматы bitcoin flex bitcoin china bitcoin bubble bitcoin trader proxy bitcoin
bitcoin видеокарта monero address These application-centric wallets exist in the form of desktop or mobile software and are available for most popular operating systems and devices. In addition to third-party applications such as Electrum, laptop and desktop users can install Litecoin Core, the full-fledged client created and updated by the Litecoin development team. Litecoin Core downloads the entire blockchain from the peer-to-peer network, avoiding any middleman in the process.bitcoin server
solidity ethereum bitcoin lurk bitcoin usb TWITTERDecentralizing file storage on the internet brings clear benefits. Distributing data throughout the network protects files from getting hacked or lost.cryptocurrency tech bitcoin коллектор комиссия bitcoin кошелька bitcoin monero форум форки bitcoin miningpoolhub ethereum ethereum регистрация total cryptocurrency bitcoin habr monero ico ethereum swarm ethereum контракт tether верификация local bitcoin wiki ethereum
ethereum github multiplier bitcoin
asics bitcoin 'In the history of culture the discovery of zero will always stand out as one of the greatest single achievements of the human race.' — Tobias Danzig, Number: The Language of Sciencedecred cryptocurrency Touchscreen user interfaceвзлом bitcoin etoro bitcoin q bitcoin bitcoin motherboard bitcoin аналоги удвоитель bitcoin reddit ethereum bitcoin avalon alliance bitcoin ethereum farm капитализация bitcoin
bitcoin торговля bitcoin etf
bitcoin анимация
blacktrail bitcoin партнерка bitcoin market bitcoin bitcoin автоматически bitcoin film tether обменник транзакции bitcoin bitcoin yandex ethereum bonus bitcoin crypto bitcoin отзывы cryptocurrency calendar ethereum stats bitcoin xl bitcoin phoenix
криптовалюту bitcoin bitcoin rate bitcoin indonesia
bitcoin продам проверить bitcoin bitcoin kazanma
dogecoin bitcoin ico monero bitcoin qiwi ethereum claymore bitcoin история monero xmr 123 bitcoin monero прогноз bitcoin server купить bitcoin java bitcoin bitcoin com testnet bitcoin bitcoin telegram mixer bitcoin валюта bitcoin bitcoin dollar captcha bitcoin auction bitcoin car bitcoin
bitcoin virus bag bitcoin polkadot dance bitcoin monero cryptonote ethereum dao bitcoin сбербанк bitcoin лохотрон
rocket bitcoin coffee bitcoin The present excessive value of Bitcoin is a operate of both the relative shortage of Bitcoins themselves and its recognition as a method of funding and wealth generation. Broadly, changing Bitcoin into extra commonplace currencies like US Dollars, British Pounds, Japanese Yen or Euro could be very very similar to changing any of these currencies from one to the other when you’re touring. You begin with one forex, state your required amount, give the worth of the primary currency plus a transaction charge, and obtain the worth in the converted foreign money in return. But since Bitcoin has no money part and isn’t available to be accepted by standard credit or debit transactions, you need to discover a dedicated market trade.Litecoin Hardware Equipment?ethereum ann карты bitcoin bitcoin config bitcoin 10 xpub bitcoin
reklama bitcoin bitcoin boom bitcoin kurs bitcoin вложить bitcoin calculator
bitcoin currency сбербанк bitcoin bitcoin википедия abi ethereum bitcoin fpga bitcoin daemon bitcoin котировки кошелек tether bitcoin сигналы bitcoin игры курс ethereum monero краны bitcoin казахстан bitcoin спекуляция tether приложение
bitcoin развод goldsday bitcoin bitcoin биржи project ethereum to bitcoin token ethereum secp256k1 ethereum spots cryptocurrency korbit bitcoin bitcoin evolution bitcoin добыть oil bitcoin bitcoin algorithm tor bitcoin flappy bitcoin платформе ethereum ферма ethereum bitcoin фильм bitcoin minecraft ethereum доходность monero ico bitcoin protocol инвестиции bitcoin bitcoin pro bitcoin россия майнинга bitcoin программа tether bitcoin теханализ bitcoin nvidia bitcoin favicon bitcoin gold скачать bitcoin finex bitcoin moneybox bitcoin
minergate bitcoin addnode bitcoin bitcoin sportsbook bitcoin network bitcoin markets
auction bitcoin ethereum график cryptocurrency law bitcoin ads roboforex bitcoin ставки bitcoin ethereum coin index bitcoin 777 bitcoin
форки bitcoin addnode bitcoin debian bitcoin faucets bitcoin konvert bitcoin bitcoin сколько
платформа bitcoin gold cryptocurrency bitcoin заработок
сбербанк bitcoin bitcoin instant bitcoin news
робот bitcoin fx bitcoin bitcoin лохотрон rpg bitcoin bitcoin trend bitcoin россия bittorrent bitcoin bitcoin покупка bitcoin car bitcoin database bitcoin allstars bitcoin лохотрон
your bitcoin bitcoin hardfork de bitcoin goldsday bitcoin red bitcoin пример bitcoin компания bitcoin bitcoin video accepts bitcoin lightning bitcoin
блоки bitcoin ico ethereum ethereum erc20 криптовалюта tether bitcoin status mine ethereum bitcoin форки кошелька bitcoin bitcoin heist
партнерка bitcoin fpga ethereum bitcoin coindesk bitcoin block token ethereum bitcoin блокчейн bitcoin metal bitcoin loan ico cryptocurrency bitcoin падает
bitcoin s
обновление ethereum bitcoin код футболка bitcoin bitcoin это bitcoin cost ethereum токен
bitcoin make bitcoin options usa bitcoin business bitcoin panda bitcoin bestchange bitcoin bitcoin faucets bitcoin вложить
iota cryptocurrency bounty bitcoin ethereum calc Regulationmonero gpu bitcoin bitcointalk bitcoin joker bitcoin video bitcoin analytics ethereum price bitcoin phoenix bitcoin падение сайты bitcoin bitcoin legal биржа monero компиляция bitcoin monero алгоритм ethereum telegram bitcoin safe bitcoin ключи 999 bitcoin 6000 bitcoin
ethereum twitter
форк ethereum
asics bitcoin habr bitcoin decred ethereum продам ethereum счет bitcoin 4. Miners Verify the Block’s Hash to Ensure the Block Is Legitimate.bitcoin avto bitcoin miner bitcoin ферма ethereum получить ethereum os monero free bitcoin system майнер bitcoin 5 bitcoin bitcoin half ethereum markets bitcoin hacker протокол bitcoin ad bitcoin bitcoin xpub xbt bitcoin валюты bitcoin
bitcoin loan cms bitcoin qtminer ethereum project ethereum пузырь bitcoin xbt bitcoin etf bitcoin demo bitcoin bitcoin airbitclub
ethereum покупка wisdom bitcoin bitcoin create bitcoin hash reddit bitcoin fire bitcoin bitcoin poker
криптовалюта tether bitcoin minecraft maining bitcoin обмен tether bitcoin genesis bitcoin changer bitcoin frog monero биржи cryptocurrency nem котировки bitcoin paypal bitcoin bitcoin python bitcoin машины форумы bitcoin bitcoin ваучер ava bitcoin ethereum описание bitcoin окупаемость grayscale bitcoin
статистика ethereum bitcoin rpg bitcoin коды bitcoin blue
фермы bitcoin ethereum описание дешевеет bitcoin
tether обзор system bitcoin bitcoin автомат обновление ethereum bitcoin calculator bitcoin анонимность алгоритм monero программа bitcoin minergate bitcoin facebook bitcoin bitcoin scan ethereum проект ethereum проблемы bitcoin bitrix ethereum stats криптовалюты bitcoin alliance bitcoin space bitcoin bitcoin qiwi bitcoin weekend bitcoin официальный bitcoin рубль loan bitcoin
aml bitcoin rotator bitcoin bitcoin safe карты bitcoin bitcoin автосерфинг киа bitcoin trade cryptocurrency
bitcoin sha256 cryptonight monero ethereum настройка kurs bitcoin clockworkmod tether bitcoin обои bitcoin 15 bitcoin scripting sberbank bitcoin faucet cryptocurrency ethereum капитализация bitcoin рейтинг purse bitcoin decred cryptocurrency ethereum php bitcoin заработок hash bitcoin bitcoin mt4 bitcoin фермы
удвоитель bitcoin Code Executionbitcoin торговать адреса bitcoin xbt bitcoin abc bitcoin cryptocurrency calendar video bitcoin
бот bitcoin bitcoin eobot bitcoin registration bitcoin change airbitclub bitcoin платформ ethereum tether верификация ethereum конвертер bitcoin обои siiz bitcoin bitcoin cost bitcoin hunter ethereum frontier андроид bitcoin ethereum хешрейт bitcoin income secp256k1 ethereum collector bitcoin платформ ethereum bitcoin отзывы
cryptocurrency charts
decred ethereum 2 bitcoin coingecko ethereum
хешрейт ethereum bitcoin автоматический rate bitcoin надежность bitcoin обзор bitcoin bitcoin описание ethereum википедия wikileaks bitcoin master bitcoin bitcoin форк investment bitcoin bitcoin com ethereum zcash hyip bitcoin foto bitcoin
ethereum продать bitcoin анимация bitcoin primedice cardano cryptocurrency монет bitcoin monero ann прогноз ethereum testnet bitcoin bitcoin kurs dark bitcoin bitcoin адрес bitcoin donate
wikipedia ethereum обмен monero gadget bitcoin
получить bitcoin bitcoin блок bitcoin x2 space bitcoin bitcoin рейтинг bitcoin today bitcoin андроид all bitcoin
token bitcoin форки ethereum комиссия bitcoin torrent bitcoin
bitcoin development bitcoin bonus panda bitcoin bitcoin abc download bitcoin bitcoin торговать bitcoin electrum server bitcoin ethereum контракт keystore ethereum аналитика bitcoin monero client bitcoin миллионеры проекты bitcoin bitcoin сша segwit bitcoin надежность bitcoin bitcoin bat bitcoin робот poloniex monero bitcoin nasdaq metropolis ethereum java bitcoin ethereum виталий monero dwarfpool иконка bitcoin ethereum nicehash
криптовалют ethereum ethereum токены