Ключевые слова: analysis, background, bank, banking, bitcoin, black, broker, business, buy, cash, closeup, coin, commerce, credit, currency, data, debit, ecommerce, economy, electronic, exchange, finance, financial, gold, golden, income, internet, investment, isolated, market, mastercard, money, network, pay, payment, stock, technology, trade, trading, virtual, visa, wealth, web,