B accepts token Z and willing to trade some goods, or even fiat for token Z so that he can use token Z to achieve something else. Then, they make a trade. In this case, value is created from thin air. The good thing is token Z cannot just disappear as everything is recorded on Blockchain in an order of time. It’s a trustless system as any movement is reported by Blockchain. Of course, B can send token Z to anyone he wants regardless of borders, or administration. That’s the strongest point of Token Z.