Fiat currencies is regulated through the central bank. Governments control fiat cash supply and issue policies from time to time that impacts their value.
Fiat money it is accepted as money because a government says that it’s legal tender, and the money’s ability to serve as a storage medium for purchasing power.
Fiat money is the opposite of commodity money, which is money that’s based on a valuable commodity, a method of valuation that was used in the past.
The central banks then value the relative worth of the currency based on the perception of how a particular country is governing itself, the current state of its economy, and the effects the interplay of those two factors have on interest rates.
Fiat system in which money is storage medium for purchasing power. Whatever currency you choose enables you to buy things as the need.
A fiat system is based on a government’s mandate that the paper currency it prints is legal tender for making financial transactions. Legal tender means that the money is backed by the full faith and credit of the government that issues it.