Hypothetical single "true" global currency

An alternative definition of a world or global currency refers to a hypothetical single global currency, as the proposed Terra, produced and supported by a central bank which is used for all transactions around the world, regardless of the nationality of the entities (individuals, corporations, governments, or other organisations) involved in the transaction. No such official currency currently exists for a variety of reasons, political, economic, and cultural.There are many different variations of the idea, including a possibility that it would be administered by a global central bank or that it would be on the gold standard .Supporters often point to the euro as an example of a supranational currency successfully implemented by a union of nations with disparate languages, cultures, and economies. Alternatively, digital gold currency can be viewed as an example of how global currency can be implemented without achieving national government consensus.A limited alternative would be a world reserve currency issued by the International Monetary Fund, as an evolution of the existing Special Drawing Rights and used as reserve assets by all national and regional central banks