This utopian model, can exist only if by the property of faith, because man must eliminate fear, because fear leads to aggression, and aggression will lead to wars between the entities, and each entity will have a private army, and whoever has more money will cause more harm, it is important that each entity will have its own cryptographic currency so that the general can weaken the harmful. And each entity will control its currency trading by having a private cryptographic exchange.

And because of all this, the true value of the entity to society is represented in its own currency.

And the entity can be a virtual entity such as a government or a collective of several concrete entities - human beings.

When entity A wants to trade with entity B, A buys B's coins from B in fiat, B opens a B+A account in his cryptographic bank so that A can sell B coins for fiat from B. A can buy goods from B with B coins that are in his B+A account.