Ключевые слова: background, bank, bit, bitcoin, black, btc, business, businessman, cash, checkout, coin, commerce, computer, credit, cryptocurrency, cryptography, currency, dash, dashes, digital, dollar, ebusiness, economy, electronic, exchange, finance, financial, future, golden, international, internet, investment, market, metal, money, network, new, online, pay, payment, purchase, shopping, sign, tablet, technology, terminal, trade, virtual, worldwide,