This has always been my concern about crypto: fiat currency is backed by judges, and if you don't do what the judge says, it is backed up by the violence of an enforcer with a weapon and the ability to put you in a cage.
Crypto doesn't have that. If someone steals it from you there is really no recourse, unless we "recentralize" the network to give certain entities more power than others like we have with fiat currency.