Crypto is on it's face at best an invented speculative version of "digital gold", at worst actively bad for everyone who isn't either trying to do illegal digital transactions or scam people who turn off their brains at "computer". Even as a speculative asset it's incredibly volatile, and as quantum computing comes online (that has a potential to break pre-quantum encryption) vulnerable to various fundamental breakages IMO. If any of the traditional cryptography people are right about quantum computing (or even if there's any traditional breakthrough in cracking algorithms) Bitcoin may be as "valuable" as gold would be if alchemy suddenly became real and I could turn any random item into gold.
What's worse IMHO is no one really settles in bitcoin. You're paying huge fees to get normal currencies into and out of crypto, and I have to believe that's passed on in the pricing by anyone who does "take crypto" - not to mention unless they're a true believer, I'd also want to price in the risk that the $100 equivalent Bitcoin (notice how nothing is priced in bitcoin) might well be $50 by the time the crypto transfer completes (though I guess it might also be $150 which is a different issue for the buyer).
Finally, Bitcoin just sucks from a usability perspective - and Ethereum isn't any better. The rest are basically memecoins no matter what they say - if you're not at least a little into crypto - have you even heard of Stellar Lumens? DOGEcoin?
I could go on, but I won't - there's less "there there" than in Fiat currencies. There's less "there there" than bullion. And there's the other obvious to me problem - as long as crypto works - for any legal transaction there are better, faster, easier and cheaper ways to settle. If stuff gets bad enough that traditional ACH, Credit, Paypal etc stop working, Crypto isn't going to work either - but bullion might. If the USD or other major currency fails (which seems unlikely, but possible) - I would personally bet on another reserve currency like Euro or GBP being picked up to settle transactions rather than Bitcoin. So Crypto remains in my mind a new kind of penny stock for people to gamble on, but it has fundamental limitations that make it impossible to scale to being any major currency (look up transactions per second on top of costs, look up fixed maximum number of bitcoin etc).