Mark Jeffrey

Serial entrepreneur and Harper Collins author | Previous: CEO, Guardian Circle ‘Friends & Family 9-1-1’ app | CTO Mahalo (backed by Sequoia, Elon Musk, Jason Calacanis) | Founder & CEO ThisWeekIn podcast network with Kevin Pollak | Founder: ZeroDegrees social network (sold to IAC 2004) | Founder: The Palace (metaverse) (1996, 10M users), sold to Communities.com, backed by SoftBank, Intel, Time Warner | ‘Trust Machine’ blockchain film (Alex Winter, Rosario Dawson) | Participated in the Ethereum ICO, YFi mint rush | First serialized podcast novel 2005 | XPRIZE Partner, TEDx speaker | Author BITCOIN EXPLAINED SIMPLY (2013), THE CASE FOR BITCOIN (2015).