Ethereum price starts declining when ICOs started failing due to scam. We all know that majority of new projrcts us their platform that is why the demand for ethereum decreased. If this continue or if there is no further development on the ethereum's team part, ethereum might as well go down in ranking in regards to marketcap.
well, ethereum is the king of altcoin, so when the price of eth declining for sure most of altcoin price will declining too
and if this decelining price on eth continues, maybe a huge impact will go to a token that created on ethereum blockchain