Ключевые слова: american, banking, banknote, bill, budget, buy, capital, cash, chain, closed, commerce, concept, credit, crisis, currency, danger, debt, dollar, economy, exchange, finance, financial, idea, investment, keep, metal, money, pack, padlock, paper, password, payment, pensions, planning, power, preparedness, profit, protect, protection, risk, safeguard, save, saving, secured, stack, system, unlock,