If humanity is ever to be free, money must be private, with government having no role in it at all. From Thorsten Polleit at mises.org:
The title of this article epitomizes what the Austrian economist Ludwig von Mises (1881–1973) called the “sound money principle.” As Mises put it:
The sound-money principle has two aspects. It is affirmative in approving the market’s choice of a commonly used medium of exchange. It is negative in obstructing the government’s propensity to meddle with the currency system.1
It is impossible to grasp the meaning of the idea of sound money if one does not realise that it was devised as an instrument for the protection of civil liberties against despotic inroads on the part of governments. Ideologically it belongs in the same class with political constitutions and bills of right.2
Mises tells us that sound money is an indispensable line of defense of people’s liberties against the encroachment on the part of the state and that sound money is a kind of money that is not dictated by the state but is chosen by the people in the free marketplace. The world we find ourselves in is a rather different place. Our monies—be it the US dollar, the euro, the Chinese renminbi, the yen, or the Swiss franc—represent fiat currencies, monopolized by the state.
Fiat money is economically and socially destructive—with far-reaching and seriously harmful economic and societal consequences, effects that extend beyond what most people would imagine. Fiat money is inflationary; it benefits a few at the expense of many others; it causes boom-and-bust cycles; it leads to overindebtedness; it corrupts society’s morals; and it paves the way toward the almighty, all-powerful state, toward tyranny.