A PATH FOR NEWCOMERS
Six questions, from curiosity to understanding
Begin with what Bitcoin is, then explore records, issuance, mining, rules, and authorization. Each step includes a diagram, an activity, and a check.
A correct understanding check marks a step complete. Progress stays in this browser; experiment input is not saved or uploaded. About 30 minutes, at your own pace.
Continue learning- 01
What exactly is Bitcoin?
Understand Bitcoin as public rules and a peer-to-peer network, without finance or programming jargon.
- 02
Why can’t bitcoin be spent twice?
Digital information can be copied. Learn how the network recognizes only one valid spend.
- 03
Why is Bitcoin’s supply near 21 million?
Understand the 21 million limit through block subsidies and halvings rather than treating it as a slogan.
- 04
What does Bitcoin mining actually do?
Learn why miners try hashes and how mining helps order and protect transaction history.
- 05
Who controls Bitcoin?
See what power developers, miners, nodes, wallets, and users each have—and why no role controls the network alone.
- 06
What does a private key prove?
Understand private keys, public keys, addresses, and signatures—and why a private key must never be shared.