As authorities start investigating, big bets in wake of Elon Musk's "Tesla going private" tweet

In the 30 years since he left the relative backwater of South Africa, Elon Musk has come to personify the American Dream: the brilliant, entrepreneurial immigrant transformed from pauper to billionaire through hard work and ingenuity. Musk has attracted fame and fortune through a series of audacious business adventures, always doubling up by risking his millions then billions on something still bigger. He has come close to being wiped out on a number of occasions, most famously when he bet heavily on a fourth Space X rocket after the first three had flopped. That time, he won. But after an unprecedented takeover offer by tweet this week, his critics believe that this time the boy from Pretoria has finally overreached.