Ethereum in the future may be king in crypto, but it takes a long time. seeing bitcoin is the root or mother of the existing coin, and also the price of the coin that is far adrift with ethereum which makes the constraint to be king in crypto. but for the moment we can not mention the king ethereum of crypto, but for the future maybe we can call it the king of crypto. see ethereum to be better and keep better than price and public confidence in ethereum.
Innovators, and developers. A lot of people are trading ETH pairs now since it's easier and cheaper to transfer ETH between exchanges. No reason to convert back to BTC to trade! Ethereum will sure increase its capitalization and recover after the market crash, but I doubt it will take the place of the king this year.