Money makes things easier, and Musk isn’t originally an American. Even $1 million would’ve made me moving to Berlin completely trivial, $100 million means you can offer to bring your friends with you without any trouble, $musk-as-cash is “buy the entire sovereign nation of Cyprus and have $70 bn afterwards” levels of money.

(But, as I said on another comment, his theoretical net worth isn’t real money, it’s how much other people reckon they could extract from the companies he controls).