Well they're good with money cause back in the day it was one of the few jobs they were allowed to do. And I guess they're good at fighting for themselves because back in the day, in fact to this day!, they've had to fight for their right to exist!!
"Ever wonder how Jews became synonymous with usury? Is it just because they were always “good with money?” Or was it, as Roman Catholic doctrine held, the devil that made them do it?
Actually, it was the Church itself.
Lost in the fog of anti-Semitic fervor was the fact that Jews had become Europe’s moneylenders because the Church, in the 12th and 13th centuries, launched an intense and protracted effort to stop Christians from collecting interest from other Christians. The Church’s reading of the anti-usury passages of the bible, however (Deuteronomy 23:20-12), permitted Jews to lend to Christians at interest. Jews, who in Central and Eastern Europe were prohibited from landholding and handicrafts guilds, had an opportunity to make a living. And with the rapid economic expansion taking place throughout northern Europe, especially in France, the robust flow of capital became a necessity, and an opportunity."