What is current monetary unit?

* United States Dollar (US$) - the most traded currency in the world.

* Euro (EUR) - the second most traded currency in the world.

* Japanese Yen (JPY) - the third most traded currency in the world.

* British Pound (GBP) - the fourth most traded currency in the world.

* Chinese Yuan Renminbi (CNY) - the fifth most traded currency in the world.

Non-fiat currencies:

* Gold - a precious metal that has been used as currency for thousands of years.

* Silver - a precious metal that has been used as currency for thousands of years.

* Bitcoin (BTC) - a digital currency that is not backed by a government or central bank.

* Ethereum (ETH) - a digital currency that is not backed by a government or central bank.