If ETH breaks below much below the 190 support level it could get very ugly. Bit I dont think it will.
In my opinion, ICO's are cashing out into fiat which is causing Eth to dump and the rest of the market is following. Shorts are taking advantage of the downward pressure. Hold because this is an expanding market that's only just begun. As long as your coin is legit it will come back. This is not a bubble and you can't compare whats going on to the stockmarket. The growth of blockchain is a kin to the growth of early internet. Its an ever expanding market, imagine when the telephone came out. Looking at that chart over a 100 years would be straight up for almost the entire time. This is what we are talking about except this will take maybe 10-20 years instead of 100. You've seen nothing yet as they say. I'm looking for ETH and BTC to both pick up where they left off by the 24th of this month.