Lesson 01 · 7 minute read
What Bitcoin actually is
Bitcoin is a system for owning and sending digital value without asking a bank or company to keep the master record.
Think of a shared notebook that thousands of independent computers continually check. Everyone can verify the entries, but no single person can secretly rewrite them.
Three parts, one idea
1. The network
Computers around the world follow the same public rules and keep matching copies of the transaction history. That shared history is called the blockchain.
2. The asset
Bitcoin—often written BTC—is the scarce digital unit recorded by that network. The rules limit the eventual supply to 21 million bitcoin.
3. The keys
Ownership is controlled with cryptographic keys. A wallet helps you manage those keys. Lose the right key without a backup and nobody can reset it for you.
What Bitcoin is not
- It is not a company with a customer-service department.
- It does not guarantee profit or protect you from loss.
- It is not the same thing as every other cryptocurrency.
- It is not anonymous by default; transactions are recorded publicly.
You now have the foundation. Next, learn why anyone assigns value to it—and why reasonable people still disagree.
Continue to lesson two