For now, ethereum hold biggest altcoin market cap. But i think ethereum place replaceable with others coin. Many good coin have potential to replace ethereum place in market cap value
I don't agree with you, indeed there are very many altcoins that have very good potential but I'm not sure if they will replace ethereum, especially distance between prices of ethereum and other altcoins is too far
i think ethereum be the king of platform of altcoin.and if we talking about market cap, maybe ripple be the nearest rival for ethereum.but i am sure ethereum could survive as king of altcoin on these side.