Vitalik, the co-founder of Ethereum, recently stated on the "Bell Curve" podcast that the actual application of technology determines the success or failure of cryptocurrency. If cryptocurrency can become mainstream, or at least a trusted alternative like Linux, then it can be considered a success.For example, Ethereum accounts can replace social account logins, or cryptocurrency can become a part of the financial system, DAO can become an alternative for enterprises or non-profit organizations, and decentralized social media or prediction markets can succeed.On the other hand, if the cryptocurrency field is remembered as a group of idealists gradually decreasing their cries, or a group of people trading digital monkeys and celebrity photos, it would be a disappointing result.