Good Bad Billionaire

Elon Musk: Money, memes and Mars

Guy Laliberté: Cirque du Soleil’s clown turned CEO

Sara Blakely: Shaping the world with Spanx

David Geffen: The Hollywood power broker

Elon Musk: You decide!

Lucy Guo: The woman training AI

Peggy Cherng: Engineering a fast-food fortune

Elizabeth Holmes: From CEO to criminal

Larry Ellison: Winning the database wars