The biggest risk to Ethereum is all those ICOs being banned, because most of them were built on top of Ether's platform.
Looking at ethereum's chart, it's fallen less than other altcoins. So a 36% drop isn't that bad. I wonder whether Tetras Capital have gone public with their short to encourage other investors to sell...
True, ETH has no value without those companies willing to use it as a fund gathering platform, but all that goes to shit if while they are still gathering the value of ETH tanks so much. A quick example: You want to build a road from one town to another and get it funded with ETH. People who live between the two cities are chipping in, but we all know that materials have to be bought with fiat, so you count the needed fiat, set up your goal in ETH, start taking donations. While 80% donations are in ETH starts tanking and goes down 30% in a month and you haven't even started buying the materials. As a result:
-The project gets delayed because you have not enough materials, even though the ICO goal has been reached.
-Investors are angry because there's no road and they don't have the money, they did all as they were asked
-Even if you gave the money back they'll be at a 30% loss
So, even if the ICO's were all doing the right estimations and honestly trying to achieve something chances are they would fail due to lack of stability in ETH. And that stability is nowhere to be found but in a leap of faith of more people going in blind.