I feel that vitalik created blockchain 2.0, which should be regarded as a milestone in the currency circle.
Blockchain is a chain/ledger and it's not the actual currency. So if you want to credit him for that then that should be for the crypto community then.
In the world of blockchain, his contribution is second after Satoshi Nakamoto.
Maybe? I'm not sure about that. There are also people that have been working next to satoshi that have contributed a lot but they're not popular. But Vitalik's contributions sure really are a lot.