Well, to get your foot in the door and get your Series 7 license takes a couple of years after college, doing the grunt work, making the cold calls, shit like that.
Investment bankers are typically MBA grads, and in many cases hold PhD's in Econ, etc. They're responsible for millions if not tens of millions of dollars at a pop. Their math and economics skills take YEARS to learn, understand, and polish.
They typically work 14-16 hour days, six or seven days a week. The Gordon Gecko stereotype is just that--a stereotype, not to be taken seriously. Do the seriously high-end type spend? You bet. Do all these folks make a career of it? Hardly. The stress is incredible, the burnout factor high, as is turnover.
Bottom line, DUmmies--it requires WORK. Lots of it. Stay on the couch and have another bong hit.