This happens all the time.
James Cameron and Larry Page among others have invested in a asteroid mining venture.
There is another company that doesn't have as much scratch that is going to try to mine them as well by 2015.
We should have been doing this for the last 50 years.
Too bad our current society is more concerned with pretending it is 1778 and only worrying about how to make more and more money and keep their right to own and shoot their guns than they are interested in finding resources in our solar system.