Ключевые слова: background, bank, banking, bit, bitcoin, blockchain, btc, business, cash, close, coin, coins, commerce, compuer, concept, cryphoghaphy, crypto, cryptocurrency, cryptographic, cryptography, currency, decentralized, digital, economy, electronic, exchange, finance, financial, gold, golden, internet, investment, keyboard, lies, market, metal, mining, money, object, pay, payment, peertopeer, sign, symbol, trade, value, virtual, web,