> > Your fancy blockchain is not going to help you if you order something with Bitcoin and no package arrives.
> That problem already has solutions
The solution to that problem is "the court orders the bank to send the funds back to my account", including all the way up to clawing back any funds the scammer spent. This is possible when the government controls the currency. It is not possible with crypto.
The only remaining purpose of crypto is funding crime. Some crime you might approve of (buying subversive literature), but that's dwarfed 100000:1 by ransomware, scams, and much more nefarious activity (drugs, sex trafficking, etc.)
Of course it's possible with crypto, it just means you can only deal with people with a known physical presence if you want any prayer of getting it back.
A judge can order a lien or seizure of their assets. I presume people that deal in crypto still want a car, a place to stay, some nice chairs or maybe to stay out of a cage when a judge determines they are willfully avoiding a court order to pay the money back.
Of course if they have no tangible assets or the entire operation is out of jurisdiction then that's an issue, but for a random joe are you really that worse off than trying to get the Chinese government to refund you for that knockoff you bought on aliexpress?