Musk's major reason to make a Mars colony is the understanding that in a post-scarcity society, the most valuable thing is freedom, and a self-sustainable territory that is far away enough from earth to make it impossible for any known communication tech to be able to govern it (and the future possibility of just fucking off to other places of the cosmos never to be found again) is the most valuable thing.
He is in the business of freedom, if you analyze his companies. Its the opposite of stake-capitalism.

Leave to a white south african to have that mindset.