Elon Musk is on the verge of becoming the first person ever worth $800 billion. Musk’s xAI Holdings raised $20 billion from private investors at a $250 billion valuation earlier this month, Forbes just confirmed. That’s up from the $113 billion valuation Musk claimed when he merged his artificial intelligence startup xAI with his social media company X (formerly Twitter) last March. Forbes estimates that the deal boosted the value of Musk’s 49% stake in xAI Holdings by $62 billion to $122 billion. The world’s richest person by far, Musk is now worth a record $780 billion, according to Forbes’...