Key Takeaways Campbell Harvey says an $8 billion 51% attack could pair Bitcoin hashpower with shorts. Duke University’s model puts the cost near 0.5% of bitcoin’s value, challenging market assumptions. In 2026, bitcoin miners and exchanges face questions over how they would counter such an attack. Harvey outlined the argument on Scott Melker’s “The Wolf of All Streets” podcast, describing a theoretical operation in which a well-funded group spends about $8 billion to gain majority control of Bitcoin’s computing power while building a large short position against the asset. The episode appeared on X. The proposal centers on a 51% …

