Ethereum and basically all other altcoins havent moved NEARLY as significantly as Bitcoin in recent times. Even looking at the last bullrun we had ethereum was at a higher price and i believe it has to do with distrust in altcoins as there were so many scams last time. Anyways i think now we are filtering out more and more over time, the altcoins that dont do anything for us and ethereum is certainly not one of them. It's quite obviously deserving of the number 1 alt spot and i believe soon this value will be recognised.