At TOKEN2049, Ethereum founder Vitalik Buterin shared his journey from his excitement about Bitcoin in 2014 to his vision of crypto as "Digital Concrete." He reflected on Bitcoin's early limitations, such as high fees and inefficiency, contrasting them with Ethereum L2's nearly zero gas fees by 2024. Buterin described the evolution of crypto as moving beyond mere efficiency to become a solid foundation for building an "electronic version of the Castle in the Sky" a blend of seriousness and fun. He even sang a snippet from Hayao Miyazaki's anime "Castle in the Sky" to illustrate his point.