Musk may ultimately fail at Tesla, but he can hardly be considered a one trick pony after Paypal and SpaceX. If you would have asked me to pick two industries

Musk may ultimately fail at Tesla, but he can hardly be considered a one trick pony after Paypal and SpaceX. If you would have asked me to pick two industries with very high barriers to entry and an existing cozy-with-regulators clique I would have picked rockets and transaction processing. On the other hand, I tried to short Tesla recently and couldn't get any shares.