Ah yes. I recall hearing about the idea that the basic economy need 3 entities. A buyer, a seller, and an accountant to record the transaction to ensure there i

Ah yes. I recall hearing about the idea that the basic economy need 3 entities. A buyer, a seller, and an accountant to record the transaction to ensure there is no double spending. In effect money of any kind replace the accountant by making sure that the buyer do not double spend by handing over the tokens that allow him to buy in the first place.