The third world countries such us kyrksitan is that the currencies has no value.
So You Can't Even Exchange them to other currencies... What They do about it?
Its Not spoken problem much but its a problem
Fiat needs to be backed by gold reserve so that it will be honor Internationally. This is the problem of the third world that don't have gold reserves and ruled by a greedy dictator. There is only few case about this issue but we can't do about this issue otherwise a user in this forum will run as president to change the way they manage there economy currency.
In my opinion, the paper money has a value locally so there's no problem on it since a person in third world country don't care about international fiat like USD because they will not use it in there own personal use.