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.
The only part he can be excused for is making the wish, imo. It is a reaction born out of his frustration with his lack of confidence, and he doesn't know that it will really work.
Once it became clear that the wish had a real effect, and he chose to ignore the real Nikki's suffering and indulge himself in the lie, he became a complete villain.
If he had instead wished for the courage to tell Nikki how he felt, completely different movie.