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Expert guides on Bitcoin security, privacy, nodes, and self-sovereignty

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BIP-110 Split: How to Check Which Chain Your Knots Node Is On

Since August 2026, some Bitcoin Knots nodes follow a different chain from Bitcoin Core. Check yours with bitcoin-cli and mempool.space before you move any funds.

Nov 3, 2026 13 min read

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Bitcoin Wallets & Self-Custody

Three Keys From the Same Vendor Are Not Multisig

Multisig only protects you if your keys can’t fail together. Same-vendor keys share one RNG, one firmware, one supply…

Aug 1, 2026 13 min read

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Bitcoin Wallets & Self-Custody

The Coldcard Seed Entropy Flaw (July 2026): Who’s at Risk and Exactly What to Do

A Coldcard firmware flaw disclosed in July 2026 made some seeds guessable, and attackers have emptied wallets built on…

Jul 31, 2026 27 min read

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Bitcoin Privacy

Coin Control in Sparrow Wallet: Label and Freeze UTXOs So You Never Merge KYC and No-KYC Coins (2026)

Coin control in Sparrow lives in the UTXOs tab: turn on the UTXO view, label every coin by source, freeze tainted or…

Jun 22, 2026 27 min read

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Bitcoin Nodes & Infrastructure

Bitcoin Core vs Bitcoin Knots in 2026: Which Node Software Should You Run?

Bitcoin Core vs Bitcoin Knots in 2026, explained without tribalism. Updated 3 Nov 2026: since the BIP-110 split and…

Jun 22, 2026 33 min read

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Bitcoin Education & Beginners

Buy Bitcoin Without ID Verification: A Safe, Honest Guide for Beginners (2026)

Can a normal person buy bitcoin without ID, and is it safe and legal? Plain-language answer up top, then the real no-KYC…

Jun 22, 2026 20 min read

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Bitcoin Privacy

Do Bitcoin ATMs Require ID? The Honest Truth (And What to Do Instead)

Do Bitcoin ATMs require ID in 2026? Almost always yes — a phone number is nearly universal and photo ID kicks in fast…

Jun 22, 2026 30 min read

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Bitcoin Wallets & Self-Custody

Do You Actually Need a Hardware Wallet? An Honest Answer for Beginners (2026)

A decision page, not a buying guide. Given how much you hold, how you use it, and your risk, do you need a hardware…

Jun 22, 2026 38 min read

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Bitcoin Wallets & Self-Custody

Hot Wallet vs Cold Wallet: Which One Do You Actually Need (and How Much in Each)?

Hot wallet vs cold wallet, explained like checking vs savings — plus the question nobody answers cleanly: how much…

Jun 22, 2026 40 min read

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Bitcoin Wallets & Self-Custody

How to Move Your Bitcoin Off an Exchange to Your Own Wallet (Safely, Step by Step)

A calm, step-by-step guide to moving bitcoin from an exchange into a wallet you control. Pick a wallet, do a test send…

Jun 22, 2026 40 min read