[BitWielder1]

There is more than that in the Earth already.
The mere existence of untold riches in the ground hasn't broken the world economy yet, we still have to extract, refine and transport it.
The advantage of mining Asteroids is that we don't have to lift all that mass out of Earth's gravity well to build spaceships or habitats.
Will it be profitable to mine in space and ship down to Earth? Maybe some day if governments don't get in the way.

[huldah1776]

Lots of good stuff in Afghanistan’s ground. It’s good ground but seems cursed. I haven’t studied their history to find out why God is so mad at them.

[rarestia]

Will it be profitable to mine in space and ship down to Earth?

Think bigger! That's much less we have to transport INTO space. That much iron and nickel would sustain development operations in near-Earth orbit and wouldn't have to be tugged into space in the first place.

The initial investment required would be high, but once the mining, refining, and development infrastructure are in place, they could build space ports, space planes, orbital habitats, satellites, etc.