Re: There are so many problems.
We've plenty of most mineral resources left. The cheap reserves may be running out, but there are pricier ones left - and still a lot cheaper than space mining.
Maybe if you can find an asteroid of largely gold or another precious metal it might be halfway viable. But those are proper asteroids - as in 'belt.' Far, far away in delta-V terms, and very massive. The delta-M would be ridiculous. You're not bringing one of those to earth with conventional rocketry.
Biting the hand that feeds IT
