Ключевые слова: 20, 50, 100, air, airplane, bank, banking, banknote, bill, blue, business, circulation, concept, conceptual, currency, economy, fifty, finance, financial, flow, franc, freedom, growth, high, hundred, idea, increase, investment, metaphore, money, moving, object, paper, plane, power, price, rate, rise, rising, risk, sky, swiss, toy, trend, twenty, upwards, value,