Wait, what is the requirement to be the king of altcoin? Is that because of the price or what? Although Ethereum has the higher price comparing the other altcoin, it doesn't make Ethereum can be a king of altcoin. Until now, I don't think that in the altcoin, there is a king that leading them because there is only one king in the cryptocurrency which is Bitcoin.
We don't need a king of Altcoin because we have Bitcoin as the king so I don't think that there is any altcoin that can be a king in the altcoin.
If you check one by one of the altcoin, you will find that there are two altcoin or (more) which have a higher price than Ethereum even of Bitcoin price. That coin is 42 coin and Nanox coin. So I think Ethereum cannot be a king of Altcoin. No offense
Maybe than we will call it a prince of the crypto currency world
In my opinion, price doesn't need to be measure for categorization of strength . Ethereum is a platform that has wide usage, almost every ICO has been made on its ERC20 token platform. That's why he is competing for the crown.
But if I have to choose, it would be USDT(Tether) as a king of alts because of his 24 hour volume on the market. The coin or token can be the best ever but if it's not being used much, it has no right to be called the King or Prince.