Every currency is volatile. Just check the last 10 years EUR/USD chart and look how many times it lost 50% of the value and gained again
Euro is not a very good example here
Since it has been sticking around (as a currency represented by actually existing money tokens) for less than 20 years. It entered circulation on January 1st, 1999, first in its non-physical form (i.e. as electronic money). If you really want to assess fiat money volatility, you'd better look into such long established currencies like British pound and Swiss franc. That will give you a better view and understanding of volatility among major monies