Currency money or book money, which are fiat money. Currency money Currency money is money in full circulation that takes its value from the precious metal it contains, that is, its market value is (almost) the value of the metal it contains (apart from the Seigniorage or the minters' profit), though this is always overcompensated for in coins and banknotes from a country undergoing debasement. Currency money is usually made of silver or gold, but in very rare cases plated metal and even copper may be used. Currency money is commodity money, as opposed to coins whose metal value is less than
Cash (currency) n.1. From an early date the Portuguese applied "caixa" (probably on the same analogy) to the small money of other foreign nations, such as that of Maritime Southeast Asia, and especially the Chinese, which was also naturally made into cash in English. (Yule)" The English word "cash," meaning "tangible currency," is an older word from Middle French "caisse". In China, "cash" - not to be confused with the type of copper coin - refers to a unit used for centuries for copper coinage and banknote equivalents known as "wén" (文). Being the first country to implement paper based currency, in