"Sami Inkinen, a co-founder of the real estate website Trulia and an accomplished triathlete, made the case for his start-up, Virta Health, while on a ride this year with Mr. Levchin and another investor and cycling enthusiast, Raymond Tonsing of Caffeinated Capital. That was exceptional, Mr. Levchin recalled. “It’s rare that you have someone who can pitch a company while riding hard, and I’m not going to slow down.”"