Research from the Cambridge Centre for Alternative Finance shows that approximately 72% to 92% of international submarine fiber optic cables would need to fail simultaneously to cause more than 10% of Bitcoin network nodes to go offline. If targeted attacks are made on critical cable bottlenecks, the failure threshold drops to 5% to 20%. The study is based on P2P network data from 2014 to 2025 and 68 verified cable failure incidents. The research also reveals that Tor enhances network resistance to interference, with about 64% of Bitcoin nodes currently 'invisible.' Historical data shows that 87% of cable failure incidents impacted less than 5% of nodes and had almost no correlation with BTC price (correlation coefficient -0.02). (Cointelegraph) https://www.(wublock123.com)/index.php?m=content&c=index&a=show&catid=6&id=58152