Almost every discussion about altcoins majorly is centered around ETH, this has taken over the first page of the
https://bitcointalk.org/index.php?board=67.0 section. This goes to show the important of the coin in the space and how much premium is being placed on it. My belief is that ETH will not die and most ICOs will continue to launch on the network. This will make the price to back up as the demand for it will increase.
For the past two years most of the altcoins discussions were about ETH as the price increased and it was going to overtake BTC. Now that the value is going down of course there are a lot of talks. There are still more than 3 million Ethers in ICOs' bags I think the price is going down more as they sell them for their expenses.
I do not think they will sell them now, if you sold them at $ 500-600. Of course there are projects that sell but not too many.