Lesson 3 — Bitcoin Blockchain

Bitcoin introduced the first widely adopted decentralized digital monetary network. Its blockchain records transactions, uses proof-of-work mining, and operates without a central issuer. Understanding Bitcoin is essential because it is the foundation of the crypto market and often influences broader market sentiment.

This lesson explains how Bitcoin works at a practical level. Transactions are broadcast to the network, miners compete to include valid transactions in blocks, and the network confirms those blocks over time. Confirmations help users understand how deeply a transaction has been accepted into the blockchain history.

Students also learn about proof-of-work. Mining is not simply “creating coins.” It is the process of securing the network, validating blocks, and making it costly to rewrite transaction history. This security model is one reason Bitcoin is treated differently from many other digital assets.

Bitcoin also has a fixed supply schedule, which makes scarcity part of its economic design. However, scarcity alone does not remove risk. Bitcoin is volatile, custody requires responsibility, transaction fees can change, and market cycles can be extreme.

The goal of this lesson is to understand Bitcoin clearly: what it is, how it works, why it matters, and what risks remain.

1. Explain proof-of-work in simple terms.
2. Use a Bitcoin block explorer and identify one transaction, one block, and confirmation count.
3. Write two strengths and two limitations of Bitcoin.
4. Explain why Bitcoin often affects the broader crypto market.