NEW: Brian Singerman, fmr Founders Fund, now GPx, on why he only invests in *people* SpaceX is the reason he joined Founders Fund in 2008 "If SpaceX didn't work, Founders Fund would not exist." From Elon & SpaceX to Karp & Palantir, to Anduril, Airbnb, Stripe, & Stemcentrx, @briansin's whole framework is one question: Is this the best founder in the world at their particular thing? We get into: - What makes Founders Fund unique: a team of strong-willed, genuinely authentic individuals -…