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Quantum computing becomes a terminal threat by 2032 - while 2032 is the industry's projected 'Q-Day,' Ethereum is targeting 2029 for post-quantum readiness to mitigate 'harvest now, decrypt later' attacks.
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Bitcoin faces an existential crisis over legacy addresses - the network must eventually decide whether to burn vulnerable coins, freeze assets, or implement a high-friction salvage process for addresses not secured by quantum-resistant signatures.
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Ethereum’s quantum upgrade is more complex than the Merge - the strategy requires a three-layer overhaul of consensus, execution, and data layers to replace ECDSA and other primitives without sacrificing network throughput.
