I respectfully disagree; it's just a choice of systems.

Fiat is an endorsement of "wise men" controlling the currency supply.  Gold/bitcoins make it far more difficult for men to change supply at a whim.

Like dictatorships, fiat is "absolute power."  A benevolent dictator, Plato's philosopher-king, can do a great amount of good.  Problem is, most dictators are rarely if ever benevolent or wise.

Supply-constrained currencies are pro-cyclical, tending to magnify booms and busts.  In theory, the central bank may work against this.  In practice... men are never perfect.

It's a choice between two systems with imperfect outputs.  I think a mix of the two is most optimal, so that you're not a slave to the whims of either practice.