Also:
>Why can't this go on?
>If this holds up, then 8200 years from now
Alright. Well how about we worry about that in 8100 years?
More money can solve some distributional probems, but ultimately not the problem of insufficient production or supply.
The classic "toy economy" example of this is "The Economic Organisation of a P.O.W. Camp", which looks at the use of cigarette-based currency within a World War II prisoner of war camp.
https://www.jstor.org/stable/2550133
It's not a perfect analogue of a true economy (goods were largely supplied to the camp through the German authorities and Red Cross shipments, there was little actual production or labour). But what was illustrated were both price fluctuations as the currency (cigarettes) increased and decreased in prevalence, subject to an innate destructive demand (habitual smokers). And when the actual supply of goods (food and other items) dried up late in the war, no amount of currency could in fact make the camp economy function.
8200 years from now (from a biological standard and considering our technological growth) we might barely be human anymore.
We would sooner need to worry about our 6th dimensional energy-blob children getting tattoos before we need to worry about the economy.