| UPDATED: 10:28, Fri, Jan 29, 2021 Link copied Sign up for FREE for the biggest new releases, reviews and tech hacks SUBSCRIBE Invalid email When you subscribe we will use the information you provide to send you these newsletters. Sometimes they'll include recommendations for other related newsletters or services we offer. Our Privacy Notice explains more about how we use your data, and your rights. You can unsubscribe at any time. The Tesla CEO told a World Government Summit he asks every candidate the same question in an effort to catch out liars. Mr Musk, also the CEO of SpaceX, has seen his fortune surge in recent weeks and is currently ranked the world’s richest person by the Bloomberg Billionaires Index.