Every fiat currency has lost significant purchasing power since 1971.
The "best" performer, the Swiss franc, is still down 66%. The US dollar has lost 87%. Most are down 99%+.
https://blossom.primal....
The euro is not on that chart, which is a big omission. The Euro is not like fiat money as a government cannot decide to print money just by its own discretion. Bitcoin also has fiat like properties as bitcoins are hedged against fiat, and thus also feels its effects.