I'm already stunned by this book that is available for free on this site.
This is a book from 1970 and in this book Hayek is predicting the use of private competing tokens.
It's a great read.
https://mises.org/library/denationalisation-money-argument-refined"As soon as one succeeds in freeing oneself of the universally but tacitly accepted creed that a country must be supplied by its government with its own distinctive and exclusive currency, all sorts of interesting questions arise which have never been examined."
Competition in currency not discussed by economists
It is an extraordinary truth that competing currencies have until quite recently never been seriously examined.1 There is no answer in the available literature to the question why a government monopoly of the provision of money is universally regarded as indispensable, or whether the belief is simply derived from the unexplained postulate that there must be within any given territory one single kind of money in circulation—which, so long as only gold and silver were seriously considered as possible kinds of money, might have appeared a definite convenience. Nor can we find an answer to the question of what would happen if that monopoly were abolished and the provision of money were thrown open to the competition of private concerns supplying different currencies. Most people seem to imagine that any proposal for private agencies to be allowed to issue money means that they should be allowed to issue the same money as anybody else '(in token money this would, of course, simply amount to forgery) rather than different kinds of money clearly distinguishable by different denominations among which the public could choose freely.
F. A. Hayek. 'Denationalisation of Money: The Argument Refined'.