According to live reports, Ethereum founder Vitalik gave a keynote speech on "What Excites Me About the Next Decade" at Token2049 held on September 18. Vitalik said in the speech that encryption is not about "efficiency" technology, encryption technology is digital concrete. Blockchain has the same origin as crypto-punk technologies such as mixnet, Tor, and BitTorrent. However, blockchain also has different aspects. Blockchain creates an extremely stable and durable structure, enabling the Internet not only to bypass the weak links in the old structure, but also to actually build better alternatives. This kind of digital concrete is to build a digital castle in the air.