On 31 October 2008 a nine-page paper signed "Satoshi Nakamoto" appeared on a cryptography mailing list: "Bitcoin: A Peer-to-Peer Electronic Cash System." The author (or group) never disclosed an identity, withdrew from the project in late 2010, and never wrote another verified message. The paper proposed a system for direct value transfer between two computers — no bank or clearinghouse in the middle. The classic problem to be solved was "double-spending": a digital file is trivially copyable, so how do you stop someone sending the same coin to two places? The proposed answer was a ledger that chained all transactions into time-stamped blocks and replicated them across thousands of machines.

On 3 January 2009 the first block — the "Genesis Block" — was mined. Embedded in it was that day's headline from The Times: "Chancellor on brink of second bailout for banks." Lehman Brothers had collapsed on 15 September 2008, and central banks worldwide had announced trillions in bailouts. Bitcoin was a direct response to that context: an asset capped at 21 million units in code, with no administrator able to print more at will. In May 2010 a Florida programmer paid 10,000 BTC for two pizzas — the first known real-world transaction. At the 2021 peak the same amount was worth roughly USD 690 million.

The second wave came in 2015 with Vitalik Buterin's Ethereum, which turned Bitcoin's limited scripting into a Turing-complete virtual machine and made "smart contracts" — pieces of code running on a ledger — possible. The first big bubble came in 2017, when Bitcoin hit USD 20,000 and then fell to a quarter of that within a year. 2020 saw the DeFi (decentralised finance) boom, 2021 brought NFTs and a new USD 69,000 peak. In 2022 the collapse of the FTX exchange exposed an USD 8 billion fraud. In January 2024 the United States approved spot Bitcoin ETFs — traditional finance officially embraced what it had dismissed for 15 years.

Bitcoin's practical impact is debated: it did not become a common payment method, its price stayed volatile, and proof-of-work mining now consumes country-scale electricity (around 150 TWh in 2024 — comparable to Poland's annual demand). But its conceptual impact endures: the definition of money (who can issue it? why does it hold value?), whether a non-state monetary system is technically feasible, and the limits of state sovereignty over money have all moved out of academic seminars and into practical policy. China, El Salvador, the EU, and the United States have each answered with a different stance — outright ban, legal tender, strict regulation, ETF approval — but none of them could simply ignore the question.