Looking back at the history of money like in “the money master” from Bill Still" one quickly loose his illusion about the stability of fiat money. I mean how long do modern human last without inflation and major economical crisis ? a few decades at most.
Take ADA like gold.
If it works for you as a medium of exchange, good. If it’s a store of value, perfect ! If you do book keeping in ADA, fine. For me it does not matter if ADA is… to be or not to be a currency.