The legal side will be one of the last barriers I agree, if a court doesn't recognize the immutability of the system then it can't be used as evidence of anythi

The legal side will be one of the last barriers I agree, if a court doesn't recognize the immutability of the system then it can't be used as evidence of anything. If blockchains can't be used as an audit trail for legal means then a lot of the value goes out the window.