World's richest man Elon Musk could become world's first trillionaire if SpaceX's planned IPO goes through at $1.5-trillion pre-money valuation, Bloomberg reported. His fortune could jump by $491 billion to $952 billion, bringing him close to the trillionaire status as his SpaceX stake would be valued at $625 billion. This could be supplemented by Tesla's $1-trillion pay package for Musk.