About

About 21 Million

21 Million is a free guide to understanding Bitcoin and holding it yourself. It's written by Bitcoiners who learned self-custody the slow way and wanted one place that explains it plainly.

What we believe

• Free first. If a free tool does the job, we say so.
• Practice before money. Every build can be tested on signet with free coins.
• No price talk. We don't predict prices or tell anyone to buy.
• Privacy matters. This site has no trackers, no ads, and no accounts.

Why we're anonymous

Talking publicly about holding bitcoin makes people a target. We follow our own advice and don't attach names or faces to this site. Judge the guides on whether they're accurate and useful.

Found a mistake?

Devices and software change often. If something is out of date, tell us and we'll fix it. A contact address is coming soon.