rare 2014 presentation by ethereum co-founder, vitalik buterin April 12, 2014 by Naomi Brockwell TV Rare 2014 presentation by Ethereum Co-Founder, Vitalik Buterin Rare 2014 presentation by Ethereum Co-Founder, Vitalik Buterin at Bitcoin Expo 2014 by Naomi Brockwell TV , April 12, 2014