Going back to a gold standard makes no sense given our understanding of economics now.
You cannot use a finite resource whose grows unreliably as a store of value for something which grows much more quickly: that is, the supply of human labor. Ultimately, that is where our money's value comes from. By that token, it would then make the most sense to argue that the money supply should more or less keep pace with population, but expanding and contracting as inflationary and unemployment circumstances require.
We could mine the asteroids for more gold and so expand the money supply.
![]()
The asteroids have plenty more gold than is available on the Earth's surface, gravity and the pressures that build quickly with depth greatly limits our ability to dig deeply into the Earth, on a weightless asteroid, that is a different story.