The king of altcoin is ethereum, definitely. There is no altcoin can even beat ethereum and the coin which can bring change is only ethereum.
right, ethereum is the king of altcoin in my opinion because, currently the altcoin under it is bitcoin and eth and no one can compete with eth in altcoin I also use eth and I am comfortable when using eth and I often benefit from eth and the cheap price becomes a big attraction for people who want to buy it, and there are many more benefits eth will get if you use it.