There is no way that ETH is touching $50 no matter what are the market condition. Unless the whole market get screwed badly and people start getting out of it, ETH is not going down to $50. That would mean disaster not only for the ETH but for the whole market. ETH has enough community support and the token has utility factor which can keep the price above $150 at least. Moreover, there is a huge volume of trade carried out through ETH. It has the demand part working for it.
Of course there is a way that it possibly happen anytime. However, ether is still good. You might be right when ether reach $50, that means the impact can cause a big storm to the whole market. Ether would stay alive as long as ICO keep popping up, as long as people still talking about it. Many hates ICO but it doesn't make ICO to stop to be born. Ethereum has a long life so we don't need to worry. Things we should be worried is our tendencies for easily getting panic.