Earlier quoted context omitted.
It would have to handle chargebacks and resolve disputes.
Those are functions of a marketplace, a low-cost pseudo-legal system so that you hopefully avoid using a state's costly and slow legal system. But if marketplaces also own the medium of exchange, e.g. marketplaces that issue tokens and only allow transacting in tokens (Paypal behind the scenes), their economic incentive is not to resolve disputes, but to create as many barriers as possible to converting tokens back i…
"Those are functions of a marketplace"
Then it seems you should have said "If only there was a technology and a marketplace which fixes this..."
And no, it doesn't exist because handling disputes is a hard problem. It's the actual moat of PayPal (and credit card companies) and the reason why they can get away with their crappy behaviour.