Agreed. But we are talking about crypto here which seem to have a lot more than shitcoins. (Hint: search for "bitcoin" or "stablecoins")
It's not even a problem if they run out of imaginary money because the fed can simply ease in more to the FDIC via debt shell games.
I'm not particularly bullish on crypto, but this is definitely not the flex you think it is.
Your local bank has a 0% reserve requirement[1]. Ofc it'll most likely get bailed out by the FDIC (by taxpayers) in case of emergency but US regulated stablecoins are in no way more risky than US banks
1: https://www.federalreserve.gov/monetarypolicy/reservereq.htm....
There are incidents where a national currency winds up getting devalued, like when Soros bet against the UK pound. But proportionately that's a small decrease in value, the pound didn't go to zero like failing stablecoins do.
It is only a question of time until it fails like everything else does, but so far so good.