A study by the Cambridge Centre for Alternative Finance reveals that the Bitcoin network can withstand up to 72% of simultaneous undersea cable failures without significant disruption. Analyzing 11 years of data and 68 cable failures, the study found that most real-world incidents affected fewer than 5% of nodes, with negligible impact on Bitcoin prices. However, the study highlights vulnerabilities to targeted attacks. If critical hub cables are attacked, the failure threshold drops to 20%. Moreover, targeting the top five hosting providers—Hetzner, OVH, Comcast, Amazon, and Google Cloud—could cause network collapse by removing just 5% of routing capacity.