Right. Still, the whole thing is plugged into society at large, including court system, so ultimately the courts have the power to force anyone in the chain to give money back and eat the loss or argue to take it from elsewhere.

To the unending dismay of crypto fans, the same is true about cryptocurrency - but its design fundamentally gives the law less leverage and actual points an intervention could be made. That, plus the whole thing is very new. But that's just a transient state; this kind of immutability is not compatible with society or real life, so the only cryptocurrency-based systems that'll survive long term will be the ones that give up on the whole cryptoanarchy thing.