Learn Bitcoin

From cypherpunk ideals to a global financial asset. The complete record of Bitcoin's birth and evolution.

7 min read

Blocks, hashes, consensus — an illustrated guide to the distributed ledger technology behind Bitcoin.

6 min read

Who created Bitcoin? A neutral, evidence-based review of the leading Satoshi Nakamoto theories — grounds, refutations, and current standing — plus the COPA v Wright ruling and how primary records are actually verified.

13 min read

What does the Bitcoin whitepaper actually say? A section-by-section guide to Satoshi Nakamoto's nine-page 2008 paper, plus a neutral account of how today's implementation differs.

20 min read

Proof of Work, difficulty adjustments, hardware evolution — the full picture of Bitcoin mining.

4 min read

A supply turning point every four years. The mechanism that underpins Bitcoin's scarcity.

4 min read

The precise issuance plan approaching 21 million. Supply schedule, lost coins, and the final coin in 2140.

3 min read

The UTXO model, transaction structure, fees, and signature verification — the complete mechanics of Bitcoin transfers.

3 min read

What is a Bitcoin full node? Why verifying for yourself matters, the differences between full/pruned/archival/SPV, storage and bandwidth needs, how Bitcoin Core setup works, the privacy implications, and the practical limits — explained neutrally.

16 min read

Hot wallets, cold wallets, seed phrases — how to safely manage your Bitcoin.

3 min read

No transaction reversal, no key reissuance, no public compensation. A beginner's guide to why Bitcoin is irreversible, how coins are lost, recovery scams, and practical defenses.

12 min read

The scale of the damage as recorded by Japan's National Police Agency and consumer-affairs data, the mechanics of social-media investment and romance fraud, phishing and Ponzi schemes, how to verify operators against the FSA registry, and where to turn if you are victimized. Figures current as of August 2026.

15 min read

Lose the keys and no one can move the coins — yet for tax purposes they are still property that can be taxed. Bitcoin inheritance lives at that intersection. A neutral walkthrough from primary sources: NTA valuation rules and carried-over cost basis, the Diet testimony that taxation applies even without the password, lifetime planning, technical options such as multisig and SLIP-39, exchange account procedures, and how other countries legislate digital estates.

16 min read

Pseudonymity, chain analysis, and CoinJoin — the reality of Bitcoin privacy and how to protect it.

4 min read

Fixed supply, digital gold, store of value — an analysis of Bitcoin's economic properties.

3 min read

Bitcoin set beside cash, bank deposits, gold, equities, Ethereum, stablecoins, CBDCs, and card payments — compared neutrally on issuance, backing, custody and transfer, protection schemes, and volatility (as of August 2026).

15 min read

Mt.Gox, Silk Road, The DAO, FTX — a record of the major events in Bitcoin's ecosystem.

5 min read

The January 2024 spot Bitcoin ETF approvals turned BTC into a standard institutional asset. This topic covers the path, the market impact, and corporate + nation-state adoption.

7 min read

Bitcoin's "second layer." Payment channels, routing, and micropayments explained.

3 min read

A new movement for inscribing digital assets onto Bitcoin blocks. What Ordinals (2023) and Runes (2024) unlocked — and the community controversy they ignited.

5 min read

Beyond Lightning — BitVM, Rootstock, Stacks, Babylon and other Bitcoin Layer 2s. Their design philosophies and real-world progress.

4 min read

Bitcoin Cash, Bitcoin SV, and soft forks — the major schisms in Bitcoin's history and the philosophical battles over "immutability."

3 min read

Not where to buy, but how buying works and what to watch for. The full map of acquisition paths, the structural difference between dealer desks and order books, identity verification under Japan's anti-money-laundering law, how to verify registration with the FSA, the four distinct kinds of fees, selling and where taxation attaches, and the real position of offshore exchanges and DEXs. This site operates no exchange and carries no advertising or affiliate links. Regulatory descriptions current as of August 2026.

16 min read

Examining common misconceptions one by one. Understanding Bitcoin based on facts, not fear.

4 min read

Essential Bitcoin terminology and the Script language explained. From blocks and nodes to PoW, UTXO, and opcodes.

9 min read

How far can bitcoin actually be used to pay? On-chain versus Lightning, the registered counts verifiable on BTC Map for the world and for Japan, the lessons of El Salvador, the types of processors on the receiving side, stablecoins on Lightning, and the friction of volatility, taxation, and irreversible refunds — set out from primary sources, with no recommendations and no forecasts. Current as of August 2026.

17 min read

FSA oversight, the FIEA migration, U.S. FIT21 & CLARITY, EU MiCA, and the Strategic Bitcoin Reserve. Taxes are covered in the dedicated Bitcoin Taxes topic.

5 min read

Japan's crypto tax regime from primary sources: miscellaneous income under progressive taxation, taxable events, cost-basis calculation, filing in practice, and exactly what the 2026 reform (20.315% separate taxation, reclassification as capital gains) has settled — and what still awaits a cabinet order.

15 min read

A neutral examination of Bitcoin's weaknesses: the 2010 overflow bug, 51% attacks, network- and mining-layer attacks, quantum risk, and the user layer.

15 min read

Monetary shortcomings, intrinsic value, wealth concentration, energy use, speculative culture — the main criticisms of Bitcoin, examined neutrally with sources.

14 min read

A neutral examination of the distance between Bitcoin's stated ideals and its reality as of August 2026: mining concentration, custody, censorship resistance, governance, institutionalization, and the two faces of energy.

14 min read