Max Levchin needs little introduction in the world of tech. As an entrepreneur, he’s been the co-founder of PayPal (now public), Slide (acquired by Google) and Affirm (reportedly about to go public), some of the hottest startups to have come out of Silicon Valley. And as an investor, he’s applied his power of observation and execution also towards helping many others build huge technology businesses. We sat down with Levchin for a recent session of Extra Crunch Live, where he spoke at length about what he sees as some of…