Don't know if this has already been stated, but the reason there are many Jewish bankers and other academic proffessionals is because this has been their trade for many generations. Why? They were not granted the right to own land and hence farm in ye olde Europe. They had no choice but to live in the towns and carry out the jobs they could to make a living in exchange for their food.
It's kind of ironic though to not grant their right to own land back then, because by being bankers instead, they technically own anything paid via loans whenever it be land, assets or resources. I guess that's where the idea that they own everything comes from, because well, when you buy something with a loan, the loaner is technically the owner of the purchase until it's paid off. Also when the loan is defaulted, the loaner can seize the assets purchased. It's a brilliant scam come to think of it. I mean if you want to gain ownership of everything and turn in some cash, give people outrageous loans with high interest rates so when the loan defaults, or the debtor goes insolvent, you'll gain that asset while making a profit. Continue this cycle while accumulating more real money and soon enough you'll own everything with immense wealth. Although there are two problems though, one, this tends to destroy the economy if done too quickly and therefore production and prosperity is lost; and two, it has a high risk of backfiring if you don't sustain the cycle or have cash flow to sustain current assets; because the maintenance costs of holding all those assets could eventually see you go bankrupt too if there's insufficient cash flow.
