It's a common misconception that the only use for eth is for icos.
Eth is essential in the maintaining of the entire ethereum network.
The whole entire ecosystem exists through eth.
To say that the value of eth will drop because icos aren't doing well is incredibly ignorant and misinformed.

When you invest in eth, you are investing in more than a crypto.
You are investing in an infrastructure for payments, p2p transactions, utility and consensus, trustless smart contracts, and entire dapp ecosystems.
That is the main reason why smart contract platforms are so valuable and out of all of them eth is king.

For me, I believe in eth and have moved my base portfolio to be eth based instead of btc based.
Sure, it has problems, but scalability and fees are directly being addressed now with solutions already coming up and being implemented by the end of the year.