Start with the foundation

What is Bitcoin?

Digital money that belongs to everyone and runs on open code. This is the plain language tour, the way Omar tells it on the show.

Reviewed and current as of September 12, 2026

01Money for the internet age

Bitcoin is money designed for a connected world. It moves across borders in minutes, works around the clock, and welcomes anyone with a phone. Participation is open by design: the network treats every user the same, wherever they live.

02How it works, in plain words

Picture a shared notebook that thousands of computers around the world keep in sync. Every ten minutes, a new page of transactions gets added, and every computer checks the math before accepting it. That notebook is the blockchain.

The computers racing to add pages are miners, and the race keeps the record honest: rewriting history would mean outracing the whole network. You hold bitcoin with a pair of digital keys. The public key is your address, safe to share. The private key is your signature, yours to guard. Together they let you send value to anyone, anywhere, directly.

03The 21 million cap

Only 21 million bitcoin will ever exist. More than 95 percent already circulate. The rest arrives slowly through mining, with the flow halving about every four years until the last fraction appears around 2140. That fixed ceiling is the heart of the Bitcoin story: a money whose supply everyone can audit and nobody can inflate. Read the halving guide to see the schedule up close.

04Why people care

Some treat bitcoin as long term savings, a way to hold value outside any single currency. Some use it to send money home across borders in minutes instead of days. Developers build on it: the Lightning Network carries instant small payments on top of the base layer. And students of money study it as the first working answer to a decades old puzzle: digital cash that runs on math instead of trusted middlemen.

05Keep learning on this site

Scroll the history chart from 2009 to today and tap the red markers for the stories behind the milestones. Check the glossary whenever a term puzzles you. And start every morning with the Daily Brief: three researched stories in plain language, written by Omar aka Crypt0.