The point of a lot of legacy finance is speculation. We could argue about whether that's a good thing, but it's not unique to crypto. But Ethereum and probably

The point of a lot of legacy finance is speculation. We could argue about whether that's a good thing, but it's not unique to crypto. 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.