The countdown to quantum computing has begun, and cryptocurrencies are facing a life-or-death test! In March 2026, Google’s Quantum AI team released a white paper stating that the quantum computing resources needed to crack elliptic curve cryptography—the encryption method currently used by Bitcoin and Ethereum—are about 20 times less than previously estimated. The 'quantum sword' hanging over cryptocurrencies is falling much faster than everyone imagined. Google previously said it might break defenses by 2029, but institutions like Citi have warned that, with AI acceleration, this timeline could be pushed forward even further. Bitcoin is especially at risk. Over the past 17 years, many wallet public keys that have been used are fully exposed on the blockchain, which is essentially like hanging your keys right on your front door. Research estimates that 35%-50% of circulating Bitcoin could be at risk because of this. If someone manages to build a sufficiently powerful quantum computer first, these 'exposed' wallets will be the first targets. Even if we start migrating to new encryption methods now, it would still take several years at the fastest. Google has expressed hopes to collaborate with institutions like Coinbase and the Ethereum Foundation to complete the migration before 2029. The scariest part isn’t whether the technology can achieve this, but whether everyone will act quickly enough. As industry security experts have said: quantum attacks won’t give you a heads-up, nor will they give you a chance to retake the test. What do you think—will quantum computing crack Bitcoin? #QuantumComputing #Cryptocurrency #Bitcoin #Ethereum #GoogleAI #Blockchain #CryptoSecurity