The price $400-600 for ETH is not fair, it costs much more.
That is why I would better hold ETH.
But in the same time I understand, that most part of ICOs are built on Ethereum and go fiat usin ETH, what influence price negatively.
In the same time, as it is the largest platform for tokens it is highly valued. That's why I am with ETH

Good point right there that ETH is very undervalued. I think most ICOs are using ETH but it doesn't really mean that those devs will dump them especially this time where ETH is cheap and is expected to reach again above $1,000 anytime this year. It is hard to pick between BTC and ETH as I like both and have lots of them.