Ключевые слова: background, bank, banking, bit, bitcoin, black, btc, business, cash, circle, coin, community, conceptual, crypto, cryptocurrency, cryptography, currency, decentralized, digital, ebusiness, economy, electronic, exchange, finance, financial, finger, gold, golden, hand, international, internet, market, metal, miner, mining, money, net, pay, payment, protocol, provider, render, savings, sign, stock, symbol, trade, valuable, virtual, web,