Ключевые слова: 100, abstract, american, background, bank, banking, banknote, bill, bit, bitcoin, blockchain, business, buy, cash, change, closeup, coin, commercial, concept, crypto, cryptocurrency, currency, digital, dollar, economy, electronic, exchange, finance, financial, franklin, future, gold, golden, hacking, internet, market, money, pay, payment, pile, ransom, security, sign, signs, stock, symbol, tax, usd, virtual, web,