There’s rich, and then there’s [Elon Musk rich](https://www.realtor.com/news/celebrity-real-estate/elon-musk-record-net-worth-billion-home/)—a level of wealth so extraordinary that the billionaire Tesla founder just landed in the history books as the first person to reach a net worth of $400 billion. Musk, 53, who also founded SpaceX and now owns the social media platform X, has held the title of
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