Not my idea of a post-scarcity utopia to give a significant percentage of the entire cosmic allotment to Elon Musk or Jeff Bezos (or their heirs) for all time while leaving a fixed portion of comparative table scraps for the trillions of humans that will someday exist.
Or the price of precious metals would plummet to near-zero, kind of like what happened to aluminum. Once considered more valuable than gold, it's in disposable soda cans now.