Elon Musk is now officially richer than Warren Buffett after Tesla's stock hits an all-time high (TSLA, BRKA)

· Elon Musk is officially more wealthy than Warren Buffett.
· Tesla stock, of which Musk is the largest holder, skyrocketed to record highs this week.
· Buffett, meanwhile, donated almost $3 billion of Berkshire Hathaway stock, causing his riches to shrink. 
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