It's very obvious that Jews are extremely disproportionately represented among the rich and very rich. 2-3% of the American population are Jews, and approximately 30-35% of the richest Americans are Jewish. It's the same thing in Canada, and elsewhere all over the globe. It's an impossible accomplishment. It's a complex subject. It's not just smarts, because let's face it--the smartest people are not necessarily the richest or even successful, necessarily. Jews did develop over the centuries, a survival approach that became innate. It manifested in adaptability--adapt to the harshest and most impossible conditions and events. So Jews have been able to adapt to exile, holocaust, inquisition, pogroms, attacks on all sides. Anti-semitism has never gone away. So Jews have always felt it necessary to be on guard, to outperform, to garner wealth as a defence tool. As a result, they tend to migrate to the cutting edge business opportunities, with high risk high reward features. A disproportionate number of hedge fund operators are Jews. Entertainment--Hollywood and TV are loaded with Jews. The programming, content, and production are all crap-shoots. You either bomb, or you score big. Real estate development is another niche disproportionately occupied by Jews. You get high leverage by way of mortgaging, pre-selling or pre-leasing, and each property is in a sense, a mini-monopoly occupying an exclusive spot on the street. High tech--yes. Google, two Jews, Brin and Page. Facebook. Microsoft. Larry Ellison. Intel. Any way of making money in a big way attracts Jews, and they excel at it. Pro poker players are disproportionately over-represented by Jews. Israeli bio-tech is a given for a dominant position in the world in that field. Jewish retailers abound. Store keepers, online retailers. Jews have been tuned in to opportunity and they pounce when it presents itself. That's why when the Soviet system crumbled and valuable indusstries were privatized for a song, Jews jumped in and became very rich. Five out of the seven original Russian oligarchs were Jews. Today, two of the five richest oligarchs are Jews. If you look at millionaires, instead of just billionaires, Jews would dominate. When a holocaust survivor is told that if he defaults on a highly leveraged real estate development he'll be foreclosed, he asks: will be be gassed? no. Will he be thrown in jail in a gulag? No. Will he be stabbed or shot in a pogrrom if he defaults on his mortgages? no. Okay, I"m in. Risks are nothing after you've been in a concentration camp and survived. Jews come and see opportunity with a newcomers fresh glasses. Not rose coloured, but not yellow jaundiced. Fresh. And they know that to grab the opportunity, you have to take action and move fast. They also know that to get ahead, you need to accumulate capital. So they save, often at the expense of high lving, or even decent living by others' standards. It's called in Yiddish, "kishke gelt", meaning money from your digestiive system, ie food etc., that you scrimp on to accumulate a nest egg to use in business.
It's an interesting cycle. Anti-semitism was often based on envy of Jewish success. The anti-semitism itself honed Jewish survival skills and the ability to thrive against all odds. so in a sense, ani-semites created rich Jews. So they could hate them even more.
Evangelical Christians would go further and say that Jews are rich because they are blessed as the chose people, as the apple of God's eye. If they are to disseminate monotheism and Judeo-Christian ethics, tthey have to be capable, which means, have enough wealth and independence to be able to do so. To be a light unto the nattions, you can't be poverty stricken. It won't work.
those are my theories, anyway.