Can Elon Musk Become the First Trillionaire?

Some financial experts say that Musk could become the world's first trillionaire and it would because of SpaceX and not Tesla. 

Musk is currently the world's richest person with a net worth of $241 billion. Or as Morgan Housel puts it, "Elon Musk's net worth is now higher than the market cap of all but 25 public companies."