Don't leave me hanging... is it me?

This is not even close to being true. Elon Musk's net worth is $850 billion. In order for that to be 1 in 200 of all wealth in the US, it would mean US wealth would have to be $170 trillion. For comparison, the World Bank estimates the entire world's GDP in 2024 to be $111 trillion.

He, in fact, owns a much larger share than 1 in 200. Though it's also obvious to anyone watching that most of this money is fake and comes from the fact that he holds a lot of assets which have extremely inflated valuations (i.e. are a bubble with no underlying economic justification).