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A Brief Look At Those Who Laid The Foundation of Bitcoin, Decentralization and DeFi reads589589589. Bitcoin is the world’s first-ever cryptocurrency, but the technical foundation of modern cryptography was laid all the way back at the beginning of the 20th century. Adam Back, David Chaum, Wei Dai and Nick Szabo laid the groundwork for what we are doing today. Hal Finney received the first Bitcoin transaction in 2009 and worked in computer game development for some years.