Elon Musk has teased Warren Buffett about his wealth, joking that his fellow billionaire "should invest in Tesla".Musk has recently stretched his lead as the world's wealthiest man, with his personal fortune swelling to a staggering $236 billion (£170 billion).The SpaceX billionaire was responding to a tweet which said that Musk's wealth is now more than Buffett's at $103 billion (£74 billion) and Bill Gates's at $130 billion (£94 billion) combined.
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