Lesson 1 of 4 · 4 min read
What is crypto?
Digital currency on a blockchain — what does that really mean?
Blockchain in 2 sentences
A blockchain is a shared ledger maintained by thousands of computers. No one can secretly alter it.
Bitcoin vs Ethereum
Bitcoin is digital gold — scarce and simple. Ethereum is a platform that apps and tokens run on.
Volatility
Crypto can move 30% in a week. Never put in more than you can afford to lose.
Bitcoin drops from $69k to $16k in one year
After the all-time high in late 2021, Bitcoin lost over 75% of its value. Investors who bought in with borrowed money or savings they needed ran into serious trouble.
Remember this
- A blockchain is a shared ledger that no one can secretly alter.
- Bitcoin = digital gold (scarce); Ethereum = platform for apps and tokens.
- Crypto is extremely volatile — 30% in a week is normal.
- Never put in more than you can fully afford to lose.
There is a quiz for this lesson
3 questions that check whether it stuck. They live in the app, because a quiz nobody grades teaches nothing.
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