Khosla Ventures investment partner Keith Rabois talks with Kara Swisher about building PayPal before the dot-com crash and the entrepreneurial lessons he applied from that company to later jobs at LinkedIn, Slide, Google and Square. Now, as a venture capitalist, he sees himself as a consulting psychologist for many companies in his portfolio. He also discusses why investors who once feared missing the next Uber are now rejecting startups with high burn rates.