Absolutely possible. Whether it’s likely any time soon is the real question. There are three types of bodies we could mine valuable materials from. The main ones would be in the various collection points in the solar system (the asteroid belt and the Trojan points of large bodies, mainly Jupiter but even Earth has some “trash” in its Lagrange points). The other two would be either NEO that pass close to the Earth, or comets that make rarer visits.

The problem with the asteroid belt and gas planet Trojans is the sheer distance involved, especially for manned mining but even for real time remote work. Perhaps with AI-guided machines, but we’re not there yet.

The problem with the nearer ones is how to either bring such things into a slower orbit, or to mine within the window where they are near the Earth.

The actual mining of bodies in space is one we can solve, once we figure out the above. Just getting to the Moon requires days and a Mars shot 2 years one way with our “primitive” and limited thrust chemical rockets.

We know it’s technically possible, the question is if it’s economically worthwhile. If space launch from Earth is cheap, the further out that date is. Reusable rockets and railgun launches could make launches much cheaper. On the other hand, when it comes to building large-scale structures in space, asteroid mining makes sense, but how far away is that day?

Precious metals like gold/platinum would be easier to get hold of there. But then if you flood the market back on Earth with them, they start to go down in value. Gold is only valuable now because it’s rare.

Forget it. Technically feasible but too expensive and too far out. And we will kill ourselves sitting on a planet shock full of ressources before we make anything of that complexity in regions so far away and so hostile.