Quantum wahala for Bitcoin cool down: Bernstein see 3–5 year runway

Bernstein dey calm people down about near-term "Bitcoin quantum threat," and e reject recent Google claim say less than 500,000 physical qubits fit attack the elliptic-curve cryptography wey dey secure Bitcoin transactions. The newer worry na "on-spend attacks": if quantum system fast well well e fit derive private key from exposed public key inside Bitcoin roughly 10-minute settlement window, and the article talk say success chance dey about ~41%. Bernstein talk say the Bitcoin quantum threat suppose dey handled as medium- to long-term migration cycle, no be existential wahala. Analysts under Gautam Chhugani estimate say e go take about 3–5 years for Bitcoin and the wider crypto industry to prepare, wey match the 2029 post-quantum cryptography migration benchmark. Important be say risk no spread everywhere. Bernstein talk say quantum exposure dey concentrated for wallet level, especially old "legacy" Satoshi-era addresses wey dey reuse or dey show public-key material many times. On the other hand, Bitcoin mining SHA-256 no dey considered meaningfully threatened like that. For traders, this framing reduce tail-risk panic and show clear practical timeline: market fit only sharply reprice if post-quantum migration milestones or wallet-reuse trends change.