Ключевые слова: background, bank, banking, bit, bit coin, bitcoin, btc, business, buy, cash, coin, commerce, computer, concept, cryptography, currency, design, digital, ebusiness, ecommerce, economy, electronic, exchange, finance, financial, gold, icon, illustration, international, internet, investment, isolated, market, money, net, network, pay, payment, shopping, sign, stack, symbol, technology, trade, value, virtual, web, white, worldwide,