EODHD Academy

Crypto Foundations

The mechanics from zero — what a blockchain is and what it solves, the scam patterns that empty wallets, why your keys are the asset, and how Bitcoin and Ethereum actually work underneath.

4 units · 16 lessons · 68 min read · plus hands-on practice, at your pace

Start here

What problem does a blockchain actually solve?

The Ledger Everyone Agrees On · 4 min read · foundations

Start the first lesson

Unit 1 The Ledger Everyone Agrees On

  1. What problem does a blockchain actually solve? 4 min
  2. Why is a blockchain hard to rewrite? 4 min
  3. Who actually runs a blockchain, and why would they? 4 min
  4. What is the difference between a coin and a token? 4 min
Practice Check · Unit 1 A short check · cannot be failed Start

Unit 2 Staying Safe

  1. Why can't a crypto transaction be undone? 4 min
  2. Why will nobody legitimate ever ask for your seed phrase? 4 min
  3. What is a token approval, and how does it drain a wallet? 4 min
  4. What do "guaranteed yield" and "rug pull" actually look like? 4 min
Practice Check · Unit 2 A short check · cannot be failed Start

Unit 3 Keys, Wallets and Custody

  1. What do you actually own when you own crypto? 4 min
  2. Where does a crypto address come from? 4 min
  3. What is a seed phrase, and what does it actually contain? 4 min
  4. Custodial or self-custody: what are you choosing between? 4 min
Practice Check · Unit 3 A short check · cannot be failed Start

Unit 4 Bitcoin, Ethereum and What They Cost to Use

  1. How does Bitcoin's supply schedule actually work? 4 min
  2. What are miners and validators actually doing, and what are they paid? 5 min
  3. What is gas, and why is "the network expensive today"? 5 min
  4. Crypto Foundations — course checkpoint 6 min
Practice Check · Unit 4 A short check · cannot be failed Start

Last Course exam

One exam, the whole course Unlocks when you have read all 16 lessons

Passing it earns the course certificate.