[jollybean]

No, this is not true.

If there was no elasticity in the monetary supply, then in both 2009 and 2021 the entire US economy would have collapsed probably taking down the world with in 2008, and most nations would have been wiped out in 2021 as well.

Also, most major currencies are managed well enough.

If you don't like your local fiat units, then don't hold on to them. Exchange them for anything else you value more and use local currency on as that - currency. Currency was never meant to be a long term store of value.