Ключевые слова: abstract, america, background, bank, banking, banknote, banknotes, bill, black, business, cash, change, collage, collection, commerce, currency, dollar, economy, euro, european, exchange, finance, financial, green, hundred, invest, investment, many, market, money, note, notes, number, paper, pay, payment, prosperity, rich, savings, sign, spending, stack, symbol, us, usa, usd, value, wealth, white,