Choosing to take an active managerial role, and needing to, is what separates bourgeoisie from petite bourgeoisie. Musk is firmly, firmly bourgeoisie. The most bourgeois bourgeoisie, one could say.
Leanfire is bourgeoisie. Being able to live off of your investments and choosing to makes one bourgeoisie.
You're trying to tie net worth to class interests, which defeats the purpose of class analysis in the first place. What connects class is not material conditions, but shared interests.