Bitcoin's network consensus mechanism, primarily its Proof-of-Work (PoW), has proven robust but faces challenges in attack resistance. The 51% attack, where a malicious entity controls the majority of hash power, remains a theoretical risk, especially as mining centralization increases. Enhancing security could involve hybrid consensus models, like combining PoW with Proof-of-Stake (PoS), to diversify attack vectors. Alternatively, implementing adaptive difficulty adjustments or decentralized mining pools could mitigate centralization risks. However, changes must balance security with Bitcoin’s core principles of immutability and decentralization. Any improvement should avoid compromising the network’s trustless nature while addressing vulnerabilities exposed by evolving threats, ensuring Bitcoin remains resilient against sophisticated attacks in a rapidly changing crypto landscape.