I don't think it took 100's of years for people to figure out that a continent teaming cod, timber, and beavers might be a good place to set up trade. Grated, early on, they thought it was a continent full of gold and spices.
I don't know what the analogous economic engine could possible be on Mars. If Mars is going to grow, we need to be able to imagine someone saying "I'm moving my family to Mars in search of a better life. I just don't see that happening. Series or L2 station? Sure, someone has to refine the iridium before we send it down the gravity well. But why would an entrepreneur want to set up shop on Mars?
I don't know what the analogous economic engine could possible be on Mars. If Mars is going to grow, we need to be able to imagine someone saying "I'm moving my family to Mars in search of a better life. I just don't see that happening. Series or L2 station? Sure, someone has to refine the iridium before we send it down the gravity well. But why would an entrepreneur want to set up shop on Mars?