60亿美元就能“击溃”比特币？

Core Viewpoint - The threat of a "51% attack" on Bitcoin is significantly underestimated by the market, with attackers potentially able to control the network for approximately $6 billion [5][2][4]. Group 1: Attack Cost and Feasibility - Attackers can achieve control over the Bitcoin network by investing $4.6 billion in hardware, $1.34 billion in data center construction, and incurring weekly electricity costs of about $130 million [2][4]. - The total cost of executing a 51% attack is estimated to be only 0.26% of Bitcoin's total network value, which raises serious concerns about Bitcoin's future viability and security [9]. Group 2: Economic Incentives and Market Dynamics - The thriving derivatives market for Bitcoin provides economic incentives for potential attackers, allowing them to establish short positions with less than 10% of the daily trading volume to gain substantial profits that could cover attack costs [8][9]. - The ability to profit from a price drop during an attack enhances the economic feasibility of such actions, making it a credible threat [4][9]. Group 3: Industry Perspectives and Counterarguments - There is a divide in the industry regarding the severity of the attack risk, with some experts arguing that the time required to accumulate and deploy mining equipment makes such an attack impractical [10][11]. - Concerns about market manipulation and the potential for exchanges to suspend trading during suspicious activities are also highlighted as factors that could deter attackers [11][4]. - Historical instances of 51% attacks on smaller blockchains, such as Bitcoin Gold and Ethereum Classic, demonstrate that while attacks can occur, the scale and support for larger networks like Bitcoin may provide more resilience [12][11].