Forbes says it has been a record year for billionaire wealth due to the AI boom and rising tech valuations For free real time breaking news alerts sent straight to your inbox sign up to our breaking news emails Sign up to our free breaking news emails Sign up to our free breaking news emails Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice Elon Musk is the richest person in the world and worth more than the next three