Jack BogleType: PersonFounder of the Vanguard Group and advocate for index fund investing.Mentioned in 2 podcast episodesPodcast AppearancesMan Who Owns 4% Of All Bitcoin: His Final WARNING To Everyone Who Doesn't Own It | Michael Saylor on The Diary Of A CEOPassive Income Expert: Buying A House Makes You Poorer Than Renting! Crypto Isn't A Smart Investment on The Diary Of A CEO