Ключевые слова: abstract, anonymous, background, bank, banking, banknote, banknotes, btc, business, buy, cash, digital, dollar, economy, euro, europe, exchange, finance, financial, france, germany, golden, growing, internet, invest, investment, market, money, pay, payment, price, quotation, rich, savings, sell, speculation, stock, technology, trade, trading, united states, us, usa, value, virtual, volatility, wealth, web,