Fiat money is currency that a government has already declared as legal tender in many countries across the world, so I think it's not possible to get crashed.
Fiats can crash against themselves anytime as some of them get strengthened. I am in a country where Fiat has experienced some crazy huge crash for a while before it started getting strengthened back after the intervention of the government with some strict monetary policies and controls.
It is normal and with most countries that rely mostly on importation, they are always bound to experience this since they depend on USD for making merchant payment, without leaving out corruption within the system as well.