The key question is whether crypto will rebound. I would expect it to, particularly as governments move more into digital currencies.
The point of crypto is to eliminate such attacks by removing the need to trust central actors like SBF and FTX. It's the reason people keep talking about "trustlessness."
This is not a panacea, and building reliable smart contracts is an ongoing technical challenge with its own social issues. To really work, users need to insist on solid audits and minimal special access for admins, just for starters. But those are different problems that had nothing to do with FTX.
But Ethereum and probably other smart contract blockchains have decentralized exchanges, where you can trade tokens around without trusting anyone to hold them for you. That stuff is working just fine.
Obviously we do need legacy systems to trade with fiat. But we don't need to trust those system to hold crypto for any longer than it takes to make that trade. "Not your keys, not your coins" has been a rallying cry of the crypto community ever since Mt. Gox failed eight years ago, but the big brains running hedge funds don't think that way.
For example, Sweden: https://www.riksbank.se/sv/betalningar--kontanter/e-krona/
The “when” and the “what” matter immensely though.
A rebound after a couple years of global recession is much different than one early next year.
A rebound of the existing big names (e.g. BTC and ETH) is much different than the rise of “fed coin” or some other chain.
An investment strategy of dollar cost average, spray, and pray, is gonna eat quite a few losers.