ETA: HN says I am replying too quickly.
here is my reply to the replies: argue against what I wrote. I said the cost of making goods is going down. Not that rare things will no longer exist. And I certainly did not speak to arbitrarily valued things like baseball cards (lol?) and "numbered art".
Who even cares? That's not remotely in the realm of discussion. No one said lowered energy costs will increase the existence of Kanye West signatures.
The point is the price of goods is going down. It means higher per capita production output. That is the only thing I said. That means cheaper houses. It means cheaper consumer goods. Not "nothing rare will ever exist again" or even "nothing will ever be scarce" -- it means the things we need to survive are no longer resource or labor gated, they are closed off as an act of political will.
If you want, make two different currencies. Some basic gov't scrip for necessities - housing, food, shelter, closing, and you can use BTC or whatever for your rich people shit and pay as much as you want for collectible shoes or whatever catches your fancy.
People will largely not care because they won't be literally starving and dying from lack of access to physiological necessities.