No hype, no price predictions
A calm cat's guide to Bitcoin
Including the one question everyone's suddenly asking: what does quantum computing actually mean for your coins?
Check your wallet's quantum exposure
Paste a Bitcoin address to see whether its public key is already visible on-chain, the detail that actually determines exposure tier.
Start here
The quantum question, piece by piece
Each of these covers one specific mechanism rather than the whole topic at once.
- Shor's algorithm, explained for bitcoin holders
- Public key vs private key, explained plainly
- How many bitcoin are actually quantum vulnerable
- Why Taproot addresses are more exposed than older ones
- Is your bitcoin safe if it's on an exchange?
- When will quantum computers actually be able to break Bitcoin?
- How to move bitcoin to a less exposed address
- What a quantum-resistant address might actually look like
- What is BIP-360? A plain-English explanation
- Post-quantum cryptography, explained simply
- Is Bitcoin more quantum-vulnerable than other coins?
- What happens to Satoshi's coins in the quantum debate
Bitcoin basics
No quantum talk here, just the fundamentals the other pages assume you already know.
- What is a Bitcoin address, actually
- Bitcoin address types: legacy, SegWit, and Taproot
- The next Bitcoin halving, explained
- Why a cat, and why Schrodinger's cat specifically
This site exists because the quantum conversation around Bitcoin got loud in 2026 without most coverage explaining the actual mechanism: which addresses are exposed and why, what BIP-360 and BIP-361 actually propose, and what you can do about it today. No moon talk, no doom either.