[immibis]

Ethereum and similar chains run arbitrary computation on-chain. You can make a futures exchange on Ethereum (or Solana, etc). However, the fees for doing so are very large, and confirmation times are very long, like any other on-chain transaction.

[awesome_dude]

What I am loving about this comment, and the downvotes, is the idea that blockchains can escape things like basic laws of the universe.

> confirmation times are very long, like any other on-chain transaction

Yes. synchronisation is where everything breaks down because you have to get everyone to agree to the new state.

edit: Sorry, not everyone, but a consensus, and that consensus is then what everyone agrees is the state.