Bitcoin is a type of digital money, like a special online coin! It's different from regular money because it's not controlled by a bank.
- Bitcoin is the first and most famous cryptocurrency.
- It's built like a simple 'dumb pipe' that moves money, allowing lots of cool things to be built on top of it.
- Two important improvements, called multisig and HD wallets, made Bitcoin safer and easier to use.
- Altcoins are other cryptocurrencies, like Ethereum and Solana, each with special features.
| Fact | Details |
|---|---|
| Bitcoin's total number | 21 million |
| A big Bitcoin price drop year | 2014 (over 50% fall!) |
| What made Bitcoin better | Multisig and HD wallets |
