Precisely because crypto will go to zero, Vitalik implements Ethereum 2.0 now) It may ever happen, everything ends one day, but hopefully not in our lives.
Does that mean you believe that Crypto will be Zero? So, if crypto really becomes zero, why is Vitalik implementing Ethereum 2.0 now? Because Ethereum 2.0 is also part of Crypto, you should think more logically about this. 