Already in 1976, F. A. Hayek stated that "one of the most effective measures for protecting the freedom of the individual might indeed be to have constitutions prohibiting all peacetime restrictions on transactions in any kind of money or precious metals."
By "any kind of money," he meant "any kinds of media of exchange, be it some commodity or money issued by another agency, domestic or foreign."
And in 1984, in one of the interviews, he noted that bankers don't understand the idea of currency competition, where anyone can issue their currency. And that's why we keep treading on the same rake.
https://youtu.be/s-k_Fc63tZI?t=205
PS 31 years later, Hayek's ideas have been implemented in bitcoin, but financial bros don't know anything about it.