Ключевые слова: american, background, bank, banking, banknote, bill, bit, bitcoin, block, blocking, btc, business, cash, coin, commerce, concept, crypto, cryptography, currency, digital, dollar, ebusiness, ecommerce, economy, electronic, exchange, finance, financial, hundred, icon, internet, lock, locking, market, metal, money, paper, pay, payment, rich, safety, savings, security, symbol, trade, usa, virtual, wealth, web,