Ключевые слова: background, bank, banking, banknote, bill, bit, bitcoin, btc, business, buy, cash, circle, coin, commerce, concept, crypto, cryptocurrency, cryptography, currency, digital, dollar, ebusiness, economy, electronic, exchange, finance, growth, hundred, international, internet, investment, market, metal, mining, monetary, money, net, network, pay, payment, rate, shopping, sign, silver, symbol, trade, value, virtual, web, wooden,