Can we please leave it up to Elon Musk whether he wants to go to Mars or not, without presupposing the notion? I'm fairly sure he might have something to say about the matter if he really does think we can do it (I feel dirty just typing this).
Edit: He has said that he is going to Mars, I know that, and I know the replies to my post here missed this. I'm saying that it's up to him to do it, without fervently believing that he is the second coming of Jesus and will in fact do this. I'm just saying that our reaction to this is not entirely outside the field of personality cult. While knowing that he did say all this, I'm also pretty sure that he will eventually accomplish that goal, and I wish him the best of luck. I'm just not sure that we should see him as the second coming of Jobs, Branson and Jesus combined, which is what this is starting to smell like.
Let the man do electric cars really well first (i.e. outside a few thousand people in California owning the Model S) and do SpaceX really well for a while and then we'll talk.
Edit 2: The more I get downvoted without an actual reply to my point being offered, the surer I'll be that it's a personality cult that's going on here. At least until I actually see more than one Tesla on the road here or some manned regular spaceflights. Let's keep in mind that it took four attempts for Falcon I to succeed, but the current score of my comment seems to suggest that apparently the attention span here isn't that long. All the best of luck (and at his skill level, luck doesn't have much to do with it any longer) to Elon Musk however, and I 100% support everything he has been doing. Although PayPal.