> Any cash comes from buyers and if there is any attack all the buyers are scared away.

Well, assuming any kind of rationality in the crypto market is always hazardous: meme coins (doge coin, shiba inu) are worth billions in market cap, so do hard forks of bitcoin, and Ethereum didn't not collapse after they decided to rollback a bunch of things they didn't like during the DAO “hack” while they are advertising Ethereum as immutable and tampering resistant.

You can never be sure how this market will react in any event (well, except Elon tweets I guess)