Target Currencies: Beyond Crypto
From Edward de Bono (1994): "Computers now make it possible to run a system with multiple target currencies....Wages might be split between different currencies--though the consumer would be able to trade between different types of currencies, exercising his or her choice."
For de Bono, target currencies are ones issued by private companies at a discount and can be used to buy their products in the future. It would be like buying airline points at a discount when planning a future trip. Unused target currency could be sold to a broker, like selling unused airline points (see the image). He foresaw a world where you could take part of your wages in these points or targeted currencies from different companies, including grocery stores.
(In fact, an IMF paper from 2004 discussed points as a quasi-money and foresaw the possible rise of exchange rates among different points.)
I can certainly see a world where people are paid in and pay out a mixture of fiat, crypto, and target currencies. A wealth app on your phone would manage your inflows and outflows, distributing income to different wallets and paying out from different wallets--all according to algorithms that maximize your wealth.