Bitcoin 51% Attack Could Be Launched for $6B in One Week
Research by Duke University finance professor Campbell Harvey indicates a Bitcoin 51% attack could be executed in one week for around $6 billion. The estimate includes $4.6 billion in mining hardware, $1.34 billion for data-center build-out and $130 million in weekly electricity.
A Bitcoin 51% attack would require controlling over 50% of the network hashrate, enabling an attacker to rewrite transactions, steal funds via double-spend attacks and threaten network security. Attackers could short nearly $70 billion in BTC futures to amplify profits, offset costs and potentially drive down prices.
Past 51% attacks on Bitcoin Gold (BTG) and Ethereum Classic (ETC) each yielded over $1 million in theft, while Bitcoin (BTC) has remained secure for 16 years. Critics argue that building a $6 billion mining infrastructure would take years, require massive collateral and attract exchange safeguards.
Still, the study highlights a serious proof-of-work vulnerability, prompting traders to monitor hashrate trends, derivatives positions and exchange risk controls.
Bearish
The risk of a Bitcoin 51% attack highlights a critical network vulnerability that could undermine investor confidence and trigger short-term price declines. Traders may react to heightened security concerns by reducing long positions and increasing hedges or short positions in BTC futures. Although long-term fixes like hardware diversification and protocol improvements could emerge, the immediate threat is likely to exert downward pressure on Bitcoin’s market price.