One conceivable reason to colonize Mars is real estate. Perhaps in the near future life extension technology will become common place, people may continue to h

One conceivable reason to colonize Mars is real estate. Perhaps in the near future life extension technology will become common place, people may continue to have kids, but natural deaths may be rare; the human population will increase exponentially and need somewhere to live and something to do -- terraforming Mars in exchange for property may be reasonable.