Why are there 21 million bitcoins?
When all mining is done, there will be a maximum of 21 million bitcoins in circulation. Why was this number chosen? My speculation: 21 million was chosen to ensure a sensible smallest unit if Bitcoin were the world’s exclusive currency.
The real unit of Bitcoin is not the bitcoin; it is the satoshi: the satoshi is the unit used in transactions, and it is indivisible. There will be 2.1e15 satoshis in circulation. The indivisible unit in USD is the cent; it’s not really possible to sell items for fractions of a cent. There are about 6e15 cents in circulation today (across all currencies). Thus if everyone used Bitcoin, the satoshi would be worth about 3 cents, which the world has decided is a sensible minimum amount.
At this time, 1 BTC would be worth $2,800,000.
More by Jim
- Your syntax highlighter is wrong
- Granddad died today
- The Three Ts of Time, Thought and Typing: measuring cost on the web
- I hate telephones
- The sorry state of OpenSSL usability
- The dots do matter: how to scam a Gmail user
- My parents are Flat-Earthers
- How Hacker News stays interesting
- Project C-43: the lost origins of asymmetric crypto
- The hacker hype cycle
- The inception bar: a new phishing method
- Time is running out to catch COVID-19
- A probabilistic pub quiz for nerds
- Smear phishing: a new Android vulnerability
Tagged . All content copyright James Fisher 2017. This post is not associated with my employer. Found an error? Edit this page.