Ключевые слова: background, bank, banking, bit, bitcoin, btc, business, buy, cash, coin, commerce, concept, conceptual, cryptocurrency, cryptography, currency, digital, ebusiness, economy, electronic, exchange, finance, financial, future, gold, golden, hand, hold, international, internet, investment, market, metal, modern, money, net, network, pay, payment, shopping, sign, symbol, technology, trade, trend, value, virtual, wealth, web, white,