Money is anything that is generally accepted as payment for goods and services and repayment of debts.The main functions of money are distinguished as: a medium of exchange, a unit of account, a store of value, and occasionally, a standard of deferred payment.
In the foreign exchange market and international finance, a world currency, supranational currency, or global currency refers to a currency in which the vast majority of international transactions take place and which serves as the world's primary reserve currency. In March 2009, as a result of the global economic crisis, China and Russia have pressed for urgent consideration of a global currency and a UN panel has proposed greatly expanding the IMF's SDRs or Special Drawing Rights.
Digital gold currency (or DGC) is a form of electronic money based on ounces of gold. It is a kind of representative money, like a US paper gold certificate at the time (from 1873 to 1933) that these were exchangeable for gold on demand. The typical unit of account for such currency is the gold gram or the troy ounce, although other units such as the gold dinar are sometimes used. DGCs are backed by gold through unallocated or allocated gold storage.