As blockchain technology continues to gain traction and evolve, how can its decentralized, tamper-proof, and transparent nature be effectively harnessed to enhance various aspects of cybersecurity, such as secure data storage, identity management, and secure communication, while also addressing the challenges and limitations posed by scalability, energy consumption, and integration with existing systems, as well as navigating the complex regulatory landscape associated with the widespread adoption of blockchain technology in the cybersecurity domain?