He has wealth, he has to dip into selling stock to have "money."

I don't disagree otherwise, but when your wealth is in the companies you own, you pretty much have to sell the whole shebang in one go (what Musk reportedly tried to do with Apple, offering to sell them Tesla as a whole) or selling it piecemeal, by selling off portions of stock (which he does fairly regularly for cash infusions).

His wealth will surely insulate him for quite a long time. However, it is not a permanent insulator, and he has made a series of, let's say, questionable decisions. It's very likely that it will either take decades for it to really hurt him, or that it just may make him far less wealthy, but still wealthy enough to be annoying.

We're also at a precipice, because the kinds of things that he is saying were the kinds of things that used to get you shitcanned from the business community as a whole. Nobody would do business with a virulent anti-semite. It's one of the reasons Musk bought Twitter, really, because they are busy normalizing positions like anti-semitism.

The normalizing of his hate will actually get him farther, longer, than his wealth.