It's important to note that FDIC doesn't kick in for instances of scams or other unauthorized transfers. It only gives assurances to deposit holders. Stablecoins under the GENIUS Act requires 100% backing and is more stringent than banks since reserve requirements are still 0%[1]. I think it's also useful to focus on stablecoins in a conversation like this rather than crypto at large.

[1] https://www.federalreserve.gov/monetarypolicy/reservereq.htm