I don't agree with Ariel on his point of view.

Because if you got the substance to be an investment banker, there is definitely got a "teaching as a profession" for him in Singapore if there is a financial crisis like now.

In addition, even though there is some so called saying that "if you do what you love, the money will follows", but the thing is as you said, investment banker is one of the few professions that enables one to make his first million in less than 10 years time.

If you make your first million, you have all the time to do what you love.