The Bitcoin whitepaper is 18 years old. The nine-page document was posted on October 31, 2008, by someone using the name Satoshi Nakamoto on a cryptography mailing list. It described a way for people to send money online without a bank approving or recording each payment. That simple idea now sits behind an asset valued at roughly $1.55 trillion, with Wall Street funds, public companies, and governments holding exposure.

A Nine-Page Proposal

The paper was titled Bitcoin: A Peer-to-Peer Electronic Cash System. It proposed a public transaction record, now called the blockchain, and a proof-of-work system. Miners spend computing power to verify transfers and add blocks. Changing old records becomes hard because it would require redoing work across the chain. Bitcoin launched on January 3, 2009, when Satoshi mined the first block.

Supply and Halvings

Bitcoin’s software set a cap of 21 million BTC. That limit was not written directly in the whitepaper. The network has followed a fixed release schedule since launch. Miners started with 50 BTC per block, and the reward is cut in half every 210,000 blocks, or about four years. After the April 2024 halving, the reward is 3.125 BTC. The article says the 20 millionth bitcoin was mined on March 9, 2026. More than 95% of supply is now in circulation. The rest should arrive slowly, with full supply around 2140.

Wall Street and Corporate Treasuries

U.S. spot Bitcoin ETFs launched in January 2024. They gave traditional investors a route through brokerage accounts, without buying BTC directly or managing private keys. The article cites figures dated October 31, 2026: these funds held about 1.28 million BTC, or 6.36% of circulating supply. Net assets reached $102.97 billion, and cumulative inflows topped $57 billion. BlackRock’s IBIT led with about $66.312 billion in assets.

Companies took another path. Strategy held 848,517 BTC as of October 31, 2026, more than 4% of the maximum supply. The U.S. government also created a Strategic Bitcoin Reserve in March 2025, starting with seized coins.

Price Path and Current Role

Bitcoin’s first dollar rate appeared in October 2009 at about $0.000764. It crossed $1,000 in 2013 and neared $20,000 in December 2017. It reached about $69,000 in November 2021, then $73,798 in March 2024. The rally continued to an intraday high of $126,223 on October 6, 2025. The article also describes a later drop to about $58,586 on June 30, 2026, and a recovery to around $77,200 by October 31. I think the price swings matter, but the bigger shift is who holds BTC now. It is no longer just a peer-to-peer experiment. It is a treasury asset, a fund holding, and perhaps a reserve asset.