>>12415501/smg/ here. Good takes, but some are not 100% right. Let's assume mining Asteroids is possible. As far as 2) is concerned, while precious metals have their uses in electronics, it never really drove prices that much because alternatives exist pretty much all the time. At least, as far as gold is concerned. It's only a bit high right now due to covid, but will go back soon enough in the 1400 bucks range once everything is sorted out. If there are no states default risks, that is. Good thing central banks of the major areas are invincible, and as such, it won't happen.
3) is true, but it's not high enough demand to sustain prices, or else gold wouldn't have underperformered for decades.
4) This is literally Saudi strategy to kill of shale oil. Look at how well that worked. It didn't. Because those "shale oil mines" work more or less like regular mines, just extract when you need to, and stop it when you don't need to. Flexibility trumps all. The same way Saudis managed to lose their decades-old monopoly to flexibility, an evil Gold Prince wouldn't get any monopoly either.
tl;dr to make it simple : The only thing Asteroid Mining would kickstart is probably some form of new industrial revolution making humanity expand more both on Earth and in space. The winners are not the boomers at /pmg/ contemplating their precious metals, but the chads at /smg/ owning stocks in companies that will boom from such an industrial revolution.