Neither will cash. Thats what a third party escrow is for. You get that as part of what you pay for a credit card. Not trying to come down on either side of this i personally hold near zero crypto, your statement was just wrong.
I love watching the HN comment hivemind speedrun the history of blockchain innovation every time this comes up. You just reinvented smart contracts on Ethereum, keep going :-)
> Not trying to come down on either side of this i personally hold near zero crypto, your statement was just wrong.
Umm, you are agreeing with the person you are responding to.
Indeed, most societies ended up inventing a mandatory trusted third party escrow called a "legal system" as part of a "state". They usually issue hard-to-copy tokens, solving the double spending problem.