Introduction to Cryptocurrencies

This lesson covers what a cryptocurrency actually is, how the blockchain underneath it agrees on who owns what, why Bitcoin’s supply is fixed, and how networks decide who gets to add the next block. By the end you should be able to explain Bitcoin from first principles, tell proof-of-work apart from proof-of-stake, and describe where these assets are bought and sold. That foundation is what every later lesson on market structure, derivatives, and risk builds on, and it is the kind of “explain it simply” question a crypto desk opens an interview with.