Microsoft Majorana 2 boosts qubit reliability, raises Bitcoin security “Q-day” risk

Microsoft unveiled the Majorana 2 topological quantum chip at Build, claiming qubits are 1,000x more reliable than prior designs. Reported qubit lifetimes are about 20 seconds, with some lasting up to ~60 seconds. The company also ties progress to agentic AI via its Microsoft Discovery platform and points to a more scalable quantum computing roadmap by 2029. For crypto traders, the key narrative remains Bitcoin security under “Q-day” risk. The article reiterates concerns that sufficiently powerful quantum computers could break today’s public-key cryptography, threatening transaction signatures. It cites Glassnode research suggesting roughly 6 million BTC (about $469B) could be exposed when the quantum era arrives, and highlights Bitcoin-specific headwinds (slower ecosystem upgrades and older Satoshi-era coins that haven’t moved for years). Timeline uncertainty is the main market variable: one camp projects functional quantum computers by 2032, while another suggests as soon as ~4 years. Overall, this is a meaningful technical update but more likely a longer-horizon catalyst—unless markets reprice Bitcoin security timelines faster in the near term.