Education

Bitcoin Quiz

Learning Bitcoin is not a race. It rewards people who are willing to sit with an idea that does not fit their existing picture of money, technology, or institutions. Take your time. Read, test, make mistakes, and come back. Hands-on experience with a wallet, a transaction, or a node teaches more than any explanation. This quiz is a measuring stick, not a final exam. It shows you where your understanding is solid and where the next question lives.

Twenty-one questions. No answers on this page. Answer them in your own words first.

What problem does Bitcoin solve that existing payment systems and banks do not?

Why does Bitcoin have a fixed supply of 21 million, and what would have to happen for that number to change?

If you control the private keys, who else can move the bitcoin?

What is the difference between a Bitcoin address and a private key?

Why does Bitcoin use energy, and what does that energy purchase?

What happens to a bitcoin transaction after it is broadcast but before it is confirmed in a block?

Can any person or company reverse a confirmed Bitcoin transaction? Why or why not?

What is a full node, and why do some people run one?

How often does the block subsidy decrease, and what is that event called?

If an exchange is hacked and you held bitcoin there, who is responsible for the loss?

What is the smallest unit of bitcoin, and why does divisibility matter?

Why can Bitcoin continue operating if one country bans it?

What is the difference between Bitcoin and most other cryptocurrencies in terms of issuance and governance?

If you lose your seed phrase and have no backup, can the bitcoin be recovered? Where does it go?

What does it mean that Bitcoin is pseudonymous rather than anonymous?

Why do miners receive newly issued bitcoin, and what do they provide in return?

Can a software developer force a change to Bitcoin’s rules? What has to happen for a change to take effect?

What is the Lightning Network, and what problem does it address?

Why is it difficult for any single entity to rewrite Bitcoin’s transaction history?

What happens to miner revenue when the block subsidy eventually reaches zero?

If someone offers you “free bitcoin” in exchange for your seed phrase or private keys, what should you do?

Take your time. If a question is unclear, that is useful information. Return to the Bitcoin 101 or Top 50 FAQ pages, then come back. Answers are kept separate so you can measure your own understanding first.