Attacking bitcoin mining with a quantum computer would require the energy of a star, academics say

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Academic research challenges claims that quantum computers threaten Bitcoin's security. A March 2026 study estimates a quantum mining attack would need 10²⁵ watts—approaching a star's energy output—making it physically impossible. Bitcoin's current network uses 15 gigawatts. Another paper questions hyped quantum computing breakthroughs. Researchers distinguish between theoretical threats to wallet security and mining dominance, suggesting crypto panic conflates genuine long-term concerns with sensationalism.

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