Back in November of 2006, before NY Mag and TimeOut put startups on the cover, before the “tech bubble”, before Twitter and Foursquare were popular, before working at a startup in NY was considered a reasonable thing to do, I was a private equity investor for a $1.6 billion fund called Quadrangle Group.It was just my third year out of college and I made a little over $250,000. For a Brazilian immigrant who spent most of his childhood kind of worried he would have to do physical labor, I felt like I had really made it. My job was challenging (making investing decisions always is) an...