Currencies are arbitrary. Gold has some industrial value, but essentially no utility to own.
Imagine the global economy collapses, and you have 100 tons of gold - what good will it do you?
Currencies have value based on what you can exchange them for - that is why dollars (and euros and all fiat) are valuable. People will give me things I want if I give them some paper. Gold as a currency is the same, but only as long as people value it. Exactly the same as fiat. It being limited only affects the per-unit PRICE assuming some value, it doesn't give it value to begin with.
I'm not the person you were arguing with before.
You are talking about prices, I am talking about value. While you have clearly read plenty of libertarian monetary policy primers, you aren't prepared to discuss this topic beyond that level.
Value does not come from rarity. It comes from utility - what a thing can do - and desire - how much other people want it.
Gold has a small amount of utility and a large amount of desire. Fiat currencies have a small amount of utility (namely paying taxes to avoid jail time) and a large amount of desire.
You rail and rail against inflationary monetary policy as if it is some inherent evil of fiat currency. The money supply can be reduced, just as it can be increased, just the supply of gold can change. It doesn't change the source of value, only the price.