S16 E41: Yonatan Sompolinsky on Bitcoin, Kaspa & Proof of Work

Aug 29, 2025

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Yonatan Sompolinsky is an academic in the field of computer science, best known for his work on the GHOST protocol (Greedy Heaviest Observed Subtree, which was cited in the Ethereum whitepaper) and the way he applied his research to create Kaspa. In this episode, we talk about scaling Proof of Work and why Kaspa might be a worthy contender to process global payments. –––––––––––––––––––––––––––––––––––– Time stamps: 00:01:22 - Debunking rumors: Why some think Yonatan is Satoshi Nakamoto 00:02:52 - Candidates for Satoshi: Charles Hoskinson, Charlie Lee, Zooko, and Alex Chepurnoy 00:03:41 - Alex Chepurnoy as a Satoshi-like figure 00:04:07 - Kaspa overview: DAG structure, no orphaned blocks, generalization of Bitcoin 00:04:55 - Similarities between Kaspa and Bitcoin fundamentals 00:06:12 - Why Kaspa couldn't be built directly on Bitcoin 00:08:05 - Kaspa as generalization of Nakamoto consensus 00:11:55 - Origins of GHOST protocol and early DAG concepts for Bitcoin scaling 00:13:16 - Academic motivation for GHOST and transitioning to computer science 00:13:50 - Turtle pet named Bitcoin 00:15:22 - Increasing block rate in Bitcoin and GHOST protocol 00:16:57 - Meeting Gregory Maxwell and discovering GHOST flaws 00:20:00 - Yonatan's views on drivechains and Bitcoin maximalism 00:20:36 - Defining Bitcoin maximalism: Capital B vs lowercase b 00:23:18 - Satoshi's support for Namecoin and merged mining 00:24:12 - Bitcoin culture in 2013-2018: Opposing other functionalities 00:26:01 - Vitalik's 2014 article on Bitcoin maximalism 00:26:13 - Andrew Poelstra's opposition to other assets on Bitcoin 00:26:38 - Bitcoin culture: Distaste for DeFi, criticism of Ethereum as a scam 00:28:03 - Bitcoin Cash developments: Cash tokens, cash fusion, contracts 00:28:39 - Rejection of Ethereum in Bitcoin circles 00:30:18 - Ethereum's successful PoS transition despite critics 00:35:04 - Ethereum's innovation: From Plasma to ZK rollups, nurturing development 00:37:04 - Stacks protocol and criticism from Luke Dashjr 00:39:02 - Bitcoin culture justifying technical limitations 00:41:01 - Declining Bitcoin adoption as money, rise of altcoins for payments 00:43:02 - Kaspa's aspirations: Merging sound money with DeFi, beyond just payments 00:43:56 - Possibility of tokenized Bitcoin on Kaspa 00:46:30 - Native currency advantage and friction in bridges 00:48:49 - WBTC on Ethereum scale vs Bitcoin L2s 00:53:33 - Quotes: Richard Dawkins on atheism, Milton Friedman on Yap Island money 00:55:44 - Story of Kaspa's messy fair launch in 2021 01:14:08 - Tech demo of Kaspa wallet experience 01:28:45 - Kaspa confirmation times & transaction fees 01:43:26 - GHOST DAG visualizer 01:44:10 - Mining Kaspa 01:55:48 - Data pruning in Kaspa, DAG vs MimbleWimble 02:01:40 - Grin & the fairest launch 02:12:21 - Zcash scaling & ZKP OP code in Kaspa 02:19:50 - Jameson Lopp, cold storage & self custody elitism 02:35:08 - Social recovery 02:41:00 - Amir Taaki, DarkFi & DAO 02:53:10 - Nick Szabo's God Protocols 03:00:00 - Layer twos on Kaspa for DeFi 03:13:09 - How Kaspa's DeFi will resemble Solana 03:24:03 - Centralized exchanges vs DeFi 03:32:05 - The importance of community projects 03:37:00 - DAG KNIGHT and its resilience 03:51:00 - DAG KNIGHT tradeoffs 03:58:18 - Blockchain vs DAG, the bottleneck for Kaspa 04:03:00 - 100 blocks per second? 04:11:43 - Question from Quai's Dr. K 04:17:03 - Doesn't Kaspa require super fast internet? 04:23:10 - Are ASIC miners desirable? 04:33:53 - Why Proof of Work matters 04:35:55 - A short history of Bitcoin mining 04:44:00 - DAG's sequencing 04:49:09 - Phantom GHOST DAG 04:52:47 - Why Kaspa had high inflation initially 04:55:10 - Selfish mining 05:03:00 - K Heavy Hash & other community questions 06:33:20 - Latency settings in DAG KNIGHT for security 06:36:52 - Aviv Zohar's involvement in Kaspa research 06:38:07 - World priced in Kaspa after hyperinflation 06:39:51 - Kaspa's fate intertwined with crypto 06:40:29 - Kaspa contracts vs Solana, why better for banks 06:42:53 - Cohesive developer experience in Kaspa like Solana 06:45:22 - Incorporating ZK design in Kaspa smart contracts 06:47:22 - Heroes: Garry Kasparov 06:48:12 - Shift in attitude from academics like Hoskinson, Buterin, Back 06:53:07 - Adam Back's criticism of Kaspa 06:55:57 - Michael Jordan and LeBron analogy for Bitcoiners' mindset 06:58:02 - Can Kaspa flip Bitcoin in market cap 07:00:34 - Gold and USD market cap comparison 07:06:06 - Collaboration with Kai team 07:10:37 - Community improvement: More context on crypto 07:13:43 - Theoretical maximum TPS for Kaspa 07:16:05 - Full ZK on L1 improvements 07:17:45 - Atomic composability and logic zones in Kaspa 07:23:12 - Sparkle and monolithic UX feel 07:26:00 - Wrapping up: Beating podcast length record, final thoughts on Bitcoin and Kaspa 07:27:31 - Why Yonatan called a scammer despite explanations 07:32:29 - Luke Dashjr's views and disconnect 07:33:01 - Hope for Bitcoin scaling and revolution