Concepts
Topic
CONCEPTS // WHAT IS WHAT
11 ARTICLES
How blocks are found
Proof of work, difficulty, and why ~10 minutes is an average, not a schedule. ~7 MIN READ ReadWhy self-custody matters
Whoever holds the keys controls the coins. What changes when that person is you. ~5 MIN READ ReadWhat is a seed phrase?
12 or 24 words (BIP39) that can restore a wallet, and why they are the whole secret. ~5 MIN READ ReadWhat is the halving?
Every 210,000 blocks the block subsidy halves, on the way to a 21 million cap. ~4 MIN READ ReadWhat is multisig?
m-of-n: several keys, a quorum to spend. Trading single points of failure for setup work. ~6 MIN READ ReadWhat is a UTXO?
Bitcoin keeps coins, not balances. How spending, change and fees really work. ~5 MIN READ ReadWhat is an address?
What you share to receive, what the formats mean, and why you check every character. ~5 MIN READ ReadWhat is a confirmation?
From unconfirmed to buried: what each new block adds, and why six is a habit, not a rule. ~5 MIN READ ReadWhat is a node?
Software that checks every rule itself. Miners propose blocks. Nodes decide if they count. ~5 MIN READ ReadWhat is a passphrase?
The optional “25th word”: what it protects against, what it does not, and what it costs you. ~5 MIN READ ReadALSO IN THE ACADEMY // GUIDES · STEP BY STEP
All 4 guides
GUIDE // START HERE
How to set up Bitcoin
Get a wallet, back up your seed phrase, receive your first sats. 5 STEPS // ~15 MIN // BEGINNER Start
GUIDE // KEYS + CUSTODY
Choosing a hardware wallet
What to look for: open-source firmware, a secure element, and a seed backup. 6 STEPS // ~10 MIN READ // BEGINNER Start
GUIDE // KEYS + CUSTODY
Moving coins to self-custody
Withdraw from an exchange to a wallet you control, starting with a small test. 6 STEPS // ~20 MIN // INTERMEDIATE Start
GUIDE // KEYS + CUSTODY
Backing up your seed phrase
Offline, durable, never photographed. Test the restore before you trust it. 5 STEPS // ~15 MIN // BEGINNER StartConcepts explain. Guides walk you through it. Games let you practise.