Google cuts quantum errors 40-fold: Is Bitcoin at risk?

Google says its latest quantum-computing work reduced errors by roughly 40-fold, a step toward more reliable quantum processors but not evidence that it can break Bitcoin’s cryptography. Current machines remain far below the scale needed to derive private keys from Bitcoin’s public-key signatures, and the development does not present an immediate threat to the network. It does reinforce the longer-term case for monitoring quantum progress and preparing a transition to post-quantum cryptography.