Billionaire Elon Musk lives the life most people dream about. He dates models and pop stars. He launches rockets and his Tesla car is still traveling in space, perhaps for eternity. But is Musk putting his health and company at risk because he's sleep deprived? He recently told “CBS This Morning’s Gayle King how he sometimes doesn't leave his factory for days on end. Musk ignited concerns about the state of his mental health when he tweeted two weeks ago about taking Tesla private.