Sure, his ketamin-addled brain has been promising us that there would be millions of humans on Mars very soon for years now. That doesn't make it real. And that does not explain either how they'd survive, or even how they'd get there in the first place. Sending one ship to Mars is something, sending thousands is unfeasible in this century.<p>Also, I don't believe they'd ever be auto-sufficient, because of the aforementioned qualities of Mars: anoxic, sterile, radioactive and subzero. They'd certainly never thrive. More probably, they'd live in a kind of inescapable company-town, millions of miles away from the nearest jurisdiction, at the mercy of a guy known for brutalizing his workers, where going on strike means you probably just die. Sounds like absolute hell.<p>So, unfeasible, unrealistic, pointless. You can do much more good for humanity by investing here on Earth, obviously.