

You’ve got it reversed. Nothing whose value increases long-term can be a good replacement for fiat currency, because then anyone with crypto will ask “should I buy this today when I know that everything will cost fewer coins next year?” and at the very best you get Japan’s Lost Decades forever.
That’s not to say that the average shitcoin would work better as a fiat currency than baseball cards, but they might not be doomed at the design stage – although they probably were to bring in the initial base of speculators who now need to find a bigger fool willing to trade something immediately usable for the shitcoin.
Funny, just a few weeks ago I read a comment elsewhere about how Frieren’s worldbuilding is unrealistic. Like its JRPG ancestor Dragon Quest 3, there’s no obvious source of food to support the walled cities of the Northern Countries. Feeding all the people in Äußerst or Eiseberg would need miles and miles of surrounding farms, not forests. I didn’t mind that on an NES, because a world map at its scale wouldn’t show farms anyway. It’s more of an issue in a manga.