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
Gulden (digital currency) this currency came from Rijk Plasman with the first working implementation released on the 4th April 2014. Initially called the “Guldencoin”, this was subsequently abbreviated in October 2015 to “Gulden”. The name Gulden comes from the German and Dutch term for “gold coin” and is the Dutch name of the Dutch guilder, the pre-euro currency of the Netherlands. The Gulden currency can be mined which is a means of creating new Gulden by using software, quite often on specially designed computers. It can also be traded on a financial market or exchange in the same way as common commodities and