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IBM releases first-ever 1,000-qubit quantum chip
(www.nature.com)
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this post was submitted on 04 Dec 2023
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QC would be completely devastating to bitcoin. Anyone with a sufficient QC could break any block of the bitcoin chain they want, essentially giving all the bitcoins to themselves. There are other cryptocurrencies that are quantum-resistant, but bitcoin itself would be done.
I would assume in the face of that the bitcoin network would have to change its consensus to include quantum resistance. I think this is possible but not sure