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Bitcoin's major bearish risk is its community's disturbing lack of interest in preparing for quantum computers that could break its encryption. At least four companies target meaningfully powerful quantum computers by the early 2030s, quantum funding has grown by tens of billions in two years, qubit timelines keep improving, and the qubit count needed to break encryption keeps falling. There is still time for a fork adding post-quantum cryptography, with little to lose by acting now. x.comÂ
