The fixation on Elon Musk's billionaire-ness overlooks the fact that he doesn't care about money (TSLA)

· Elon Musk has said he's ridding himself of earthly possessions.
· But he mostly owns California real estate — millions of dollars worth, an illiquid asset that's hard to sell.
· His Tesla shares, after a massive run-up, are worth close to $40 billion, but he almost never sells stock. He lives off loans from major banks,...