Gary, while a professor, gave lectures on Bitcoin and Crypto. From those lectures he clearly understands Bitcoin.
Here is the list of his required readings for his "Blockchain And Money" class he taught at MIT:
  • ‘Conflict reigns over the history and origins of money’ Science News (July 29, 2018)
  • ‘A Brief History of Money’ IEEE Spectrum (May 30, 2012)
  • ‘What is Money? An Artist’s Make and Take’ Wall Street Journal video (November 11, 2014)
  • ‘A Brief History of Ledgers’ LLFOURN, Medium (February 15, 2018)
  • ‘Bitcoin and Cryptocurrency Technologies, Preface — The Long Road to Bitcoin’ (PDF - 18MB) Clark (pages 3 – 21) (February 9, 2016)
  • ‘Bitcoin: A Peer-to-Peer Electronic Cash System’ (PDF) Nakamoto (October 31, 2008)
  • ‘Blockchain Technology Overview’ (PDF) National Institute of Standards and Technology (January 2018) (pages 9 – 23, sections 1 & 2)
  • ‘Blockchain 101 — A Visual Demo’ Brownworth, MIT (November 5, 2016)
  • ‘21st Geneva Report on the World Economy - The Impact of Blockchain Technology on Finance: Catalyst for Change’ Chapter 1 (pages 1 – 7); Casey, Crane, Gensler, Johnson, and Narula (July 2018)
  • ‘Blockchain Technology Overview’ (PDF) National Institute of Standards and Technology (January 2018) (pages 9 – 23, sections 1 & 2)
  • ‘The Byzantine Generals Problem’ Lamport, Shostak, & Pease; ACM Transactions on Programming Languages and Systems (TOPLAS), 4(3), (July 1982) (required 382-387)
  • ‘A (Short) Guide to Blockchain Consensus Protocols’ CoinDesk (March 4, 2017)
This is just his required reading, the optional reading list for his course goes into DAPPs, Smart Contracts, etc.