Wu learned that Vitalik Buterin registered a new $ENS domain name "dacc.eth" today, where DACC stands for "Defensive Accelerationism" (d/acc), contrasting with the widely discussed "Effective Accelerationism" (e/acc) in Silicon Valley. E/acc advocates accelerating social welfare through technological progress, while d/acc promotes advancing technology development in areas such as network security and privacy protection to address potential threats. Vitalik has written extensively on technological optimism, believing that a world prioritizing defense is not only safer but also promotes healthier and more free governance.