I watched the movie about the Wall Street in New York. Maybe the matter was so-called “subprime loan” in the USA. I don't know about money and banking in detail. I think that many Japanese don't like money and banking, but they are necessary for investing the pension, the deposit or the insurance.
We need efforts for getting money. When we can get some money by money and banking, it is a kind of labor certainly. We can see actions of produce or service, but money and banking are a little shady.
Huge money has been moving around the world instantly, and some persons can get huge money, but many persons lose huge money at the same time. I will not criticize money and banking.
Anyway they are a kind of capitalism, but easy money always involves some danger. A gamble is also same. I will not say that money and banking are gambles.