World's tech billionaires add record $845 billion to wealth amid AI boom: Report

World's tech billionaires added record $845 billion to their wealth in first nine months of the year, taking their collective net worth to $4.6 trillion amid the AI boom, according to Bloomberg Billionaires Index. American billionaires accounted for 94% of the increase, with Elon Musk adding the most at $310 billion. Michael Dell and Mark Zuckerberg also saw major gains.