That still doesn’t offer any solution to negotiability, if someone misleads you or tricks you there is no recourse as long as the party who mislead you chooses not to sign your assets back to you aside from hard forking, and if you’re going to hard fork your silly blockchain every time someone gets screwed by piss poor tech then what is the point of having the block chain at all? The biggest benefit of a block chain is that you can proceed with 0 trust but the fact that you’re going to have to do all of the same due diligence that you would normally need to do to buy or sell valuable art there is literally 0 benefit at all to adding blockchain nonsense to the process.