Elon Musk was the first to take a spin in Tesla’s sleek, self-driving Cybercab last week, proudly traveling along the film-set replica of city streets at Warner Bros. Studios in Burbank, Calif. For the public tuned into the livestream,

Elon Musk's net worth plummeted along with Tesla stock after the company's lackluster Robotaxi release — but he's still the world's richest man.