Ключевые слова: background, banking, banknote, bill, bitcoin, btc, business, buy, cash, coin, concept, cryptocurrency, cryptography, currency, digital, ecommerce, economy, electronic, exchange, finance, financial, five, gold, hundred, internet, investment, market, metal, mining, money, net, paper, pay, payment, rate, rich, rouble, ruble, russia, russian, saving, sign, silver, success, symbol, trade, virtual, wealth, web, wooden,