Bitcoin · Austrian Economics · Sovereignty
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Master Bitcoin and economics, step by step
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How SHA-256 underpins proof of work, Merkle trees, address generation, and the chain of blocks itself. The four properties that make a hash function useful and exactly where Bitcoin uses each.
AI agents cannot get credit cards. Visa bans automated systems and settlements take days. Lightning Network already filled the gap. From the revival of HTTP 402 to the x402 protocol, here is how the payment layer for the AI era is being built.
A practical guide for South Korean residents on buying Bitcoin - real-name account requirements, comparison of Upbit, Bithumb, Coinone, and Korbit, KYC and Travel Rule navigation, tax obligations under the 2025 framework, and the essential final step of moving Bitcoin off the exchange to your own wallet. The exchange is the on-ramp, not the destination.
A practical guide for merchants and small businesses on accepting Bitcoin payments - the case for and against, BTCPay Server self-hosting vs custodial processors (Strike, OpenNode, IBEX), Lightning vs on-chain trade-offs, accounting treatment, tax implications, and jurisdiction-specific rules for the US, South Korea, and Japan. Not financial or legal advice.
A practical guide to donating Bitcoin to qualified charities - the tax advantages of donating appreciated property, how to choose a reputable charity, step-by-step donation methods, record-keeping requirements, and jurisdiction-specific rules for the US, South Korea, and Japan. Not tax advice.
A plain-English guide to E2EE key backup on chat.txid.uk - what a Security Key vs a Security Phrase does, and how to recover old messages on a new device.
Explore the txid.uk ecosystem
