Recent quantum breakthroughs cut required qubits 20‑fold, shortening the timeline for a Bitcoin encryption threat.
Analysts say scaling to thousands of logical qubits remains a multi‑year engineering challenge, giving a 3‑5‑year window for post‑quantum upgrades.
Bitcoin plans a soft‑fork to adopt quantum‑resistant signatures like SPHINCS+ and Lamport, expecting high user migration to secure addresses.