We’ve got a lot of resources for the next century or two. Things like Oil might run out, but there are other alternatives - they’re just more expensive.

Mining the asteroids is a far more expensive proposition than setting up microwave transmitting solar collectors for energy (for example), and that’s a far more expensive proposition than using the energy resources still available on earth. “Precious” metals are never “used up” they’re just “used” and expensive to recover - less expensive than mining asteroids though.

We’re thousands of years from needing to mine off planet for economic reasons (hundreds at the very least.)

I think the first step is to take space travel away from government control. That’s happening now. I’ll talk about it in my next post though.