Bitcoin
Bitcoin mempool: pending transactions and choosing a fee
The Bitcoin mempool is a node’s collection of accepted transactions that have not yet been confirmed. It is…
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Bitcoin
Bitcoin is the starting point for understanding crypto: monetary network, mining, fees, wallets, UTXOs and Lightning Network. Start with the pillar guide What is Bitcoin, how it works and why it matters, then continue with Bitcoin fees, UTXOs and Lightning Network.
Bitcoin
Strategy buys 4,603 Bitcoin: cash, shares and MSTR risk
Updated 1 September 2026. Strategy buys: Strategy told the SEC that it acquired 4,603 BTC between 24 and…
Bitcoin
Bitcoin gap limit: why wallet funds can look missing
The Bitcoin gap limit is an address-discovery rule, not a cap on how much bitcoin you can own.…
Bitcoin
Bitcoin UTXO consolidation: fees, timing and privacy
Bitcoin UTXO consolidation means spending several outputs into one or a few new outputs that you control. It…
Bitcoin
Bitcoin RBF and CPFP: how to raise a stuck fee
An unconfirmed Bitcoin transaction does not become faster because someone sends a second payment or adds an arbitrary…
Bitcoin
Proof of work: what it is and why it secures Bitcoin
Last updated: July 2026. Proof of work is an evergreen concept to understand before using crypto seriously. In…
Bitcoin
What is Bitcoin, how it works and why it matters
Last updated: July 2026. What is Bitcoin? Bitcoin is a digital monetary network that lets people transfer value…
Bitcoin
Bitcoin UTXO: what they are and why they matter
Bitcoin UTXOs are unspent transaction outputs: amounts created by earlier transactions that can still be spent if their…
Bitcoin
Lightning Network: what it is and when it really helps
Lightning Network is a network of payment channels for transferring bitcoin without recording every individual payment on the…
Bitcoin
Bitcoin fees: what they are and how not to overpay
Updated June 20, 2026. Bitcoin fees are the cost you pay to have a transaction included in a…