I have some time and flexibility in my current postdoc position to go about developing skill sets that will make me more employable. I have a choice of projects that are more programming, computational,theoretical, EE, or clean room (photo-lith, PVD,etc...) related. And I have enough free time to go about studying for finance positions. My question: Are the profits from the finance and banking sectors sustainable? I do want to make a decent living, but I have this nagging suspicion that most of Wall st is a giant scam. I.e. a "stable" and decent living would require developing skills that allow me to produce something as opposed to moving money around.