If you get billions of dollars, you'll be happy that the asteroid mining guys put the space infrastructure in place to allow you to do really cool things.
Agreed. I've been pondering ways to bootstrap space-based mining and manufacturing for a long, long time and while I believe that I have some solid ideas, I just don't have the capital to do anything about it in the least.
They'll probably be looking to hire engineers in the next few years tho. If you've got some skills and knowledge that could be helpful. Then there's still time. :-)
Seriously. Space mining and pressure from environmentalism is going to turn this whole field into rivers of gold ... in the sky.