Whitney Tilson’s email to investors discussing the Pivot conference in Miami; back to Earth or temporary setback? Revisiting the FANGAM stocks; are activist short sellers misunderstood? Q4 2021 hedge fund letters, conferences and more Pivot Conference In Miami1) As you read this, I’m on a flight to Miami for the first-ever Pivot conference, named after the podcast I enjoy that’s hosted by two of my favorite commentators, NYU marketing professor Scott Galloway and New York Times tech columnist Kara Swisher. I’m looking forward to hearing from them as well as a range of great speakers, including…