If you just think about it in terms of real estate values, Earth has all these great amenities that Mars doesn't (and won't for a long time, if ever). * Breath

If you just think about it in terms of real estate values, Earth has all these great amenities that Mars doesn't (and won't for a long time, if ever). * Breathable atmosphere * Full gravity * Low radiation * Decent temperatures In a world of "location, location, location," Mars is going to be cheap beyond imagination. Perhaps it will be where all the poor people end up, after they're gentrified off Earth.