Way I heard it (back in Trump I) was that, yes, his primary motivation was to indulge himself, but he was quite happy to make more bank and influence when Mossad came to him. Who doesn't like to profit off their hobby? And just like the CIA, Mossad doesn't mind at all delving into the nastiest stuff if they can use it against powerful people and profit.
For what that's worth. This came from following NATSEC types on Twitter the first time around.
My bad. It was collapsed on old.lemmy.world when I posted.