Fiat money via WIkipedia:

Fiat money can be:
* Any money that is not backed by a commodity.
* Money declared by a person, institution or government to be legal tender,[5] meaning that it must be accepted in payment of a debt in specific circumstances.[6]
* State-issued money which is neither convertible through a central bank to anything else nor fixed in value in terms of any objective standard.[7]
* Money used because of government decree.[2]
* An otherwise non-valuable object that serves as a medium of exchange[8] (also known as fiduciary money).[9]

Doesn't have to come from a government. Crypto is three of these. The article even starts with "Fiat money is a type of currency that is not backed by a commodity, such as gold or silver." Nothing about government there either.