Projected Advancement of Quantum‑Computing Threats to Bitcoin (Q‑Day Shift) — E8 Intelligence Research

Discovered via YouTube Monitor: "Google Just Moved Q-Day Up By 6 Years (Nobody Is Talking About This)" (Julia McCoy) URL: https://www.youtube.com/watch?v=OYaODWIg8Ok Julia McCoy argues that breakthroughs in quantum hardware will enable a practical attack on Bitcoin's cryptographic chain by 2029, effectively moving the anticipated 'Q‑Day' six years earlier than most academic forecasts. She cites recent improvements in error‑corrected qubit counts and reduced decoherence times as the technical drivers of this acceleration. Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com

Authors

Publication Details

Journal
Zenodo (CERN European Organization for Nuclear Research)
Published
2026-05-29
DOI
https://doi.org/10.5281/zenodo.20436283
Primary Topic
Quantum Computing Algorithms and Architecture
Type
preprint
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preprint

Projected Advancement of Quantum‑Computing Threats to Bitcoin (Q‑Day Shift) — E8 Intelligence Research

Andrew Stewart Caldin
Zenodo (CERN European Organization for Nuclear Research)
Quantum Computing Algorithms and Architecture
preprint

Projected Advancement of Quantum‑Computing Threats to Bitcoin (Q‑Day Shift) — E8 Intelligence Research

Andrew Stewart Caldin
preprint en

Abstract

Discovered via YouTube Monitor: "Google Just Moved Q-Day Up By 6 Years (Nobody Is Talking About This)" (Julia McCoy) URL: https://www.youtube.com/watch?v=OYaODWIg8Ok Julia McCoy argues that breakthroughs in quantum hardware will enable a practical attack on Bitcoin's cryptographic chain by 2029, effectively moving the anticipated 'Q‑Day' six years earlier than most academic forecasts. She cites recent improvements in error‑corrected qubit counts and reduced decoherence times as the technical drivers of this acceleration. Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com

Zenodo (CERN European Organization for Nuclear Research)
Quantum Computing Algorithms and Architecture
DOIOpen Access PDFOpenAlex
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