👛 What Is a Wallet?

The keychain, not the vault

Surprise: a Bitcoin wallet doesn’t contain bitcoin.

Your bitcoin lives on the shared ledger — the one on thousands of computers worldwide. What your wallet holds is your keys: the secret that proves it’s yours and lets you move it.

Think of it as a keychain, not a purse.

Quick check: If your phone (with your wallet app) falls in the ocean, your bitcoin is…

1. Gone forever, obviously
2. Fine — it lives on the network; you restore access with your backup ✓
3. Property of the fish now

The bitcoin never was "in" the phone. Restore your keys from backup on any new device, and everything reappears. The backup is what you must protect — more on that next.

Two keys, two jobs

Every wallet has:

• A public address — like your email address. Share it freely; people use it to send you bitcoin.
• A private key — like your email password. Whoever holds it controls the money. Never share it. Ever. With anyone.

Every scam in existence is a trick to get your private key. Every security rule boils down to guarding it.

Quick check: Someone asks for your PUBLIC address to send you bitcoin. Is that safe?

1. Yes — that’s exactly what it’s for ✓
2. No! Never share anything!
3. Only on Tuesdays

Public address = safe to share, like telling someone your email. Private key / seed phrase = never share, like your password. Keep those two categories straight and you’re 90% secure already.

The magic 12 words

Here’s the elegant part: your private keys can be written down as 12 simple words called a seed phrase — like ocean tiger lemon...

Those 12 words ARE your wallet. Lose your phone, house, everything — with those words, your bitcoin comes back on any device, anywhere on Earth.

Ready to practice — with zero risk? Next lesson is a game. 🎮