THE BLOCK · 2026-11-11 11:43 UTC

Bitcoin and Blockchain Basics

Bitcoin is a decentralized digital currency on a peer-to-peer network, secured by Proof of Work, with a blockchain public ledger of hash-linked blocks. Private keys authorize spending, and wallet software signs transactions that nodes independently verify. The article is an educational course overview covering mining, the 21 million supply cap, halvings, wallets, and transactions, and says Bitcoin launched in 2009 after Satoshi Nakamoto's 2008 whitepaper.

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