No big bad news, it's hard to get back to $400!
If Ethereum ends up going that low, then it would mean it is giving a lot of people another chance to buy that low, but seeing that low is what I cannot imagine yet, but we can only know when we get to see it. The truth is that no one can see the future and anyone who tells you that as an affirmative statement is either high on some cheap weed. The thing is that Ethereum has had some huge drop in prices before and pretty stable ones as well.
$400 however, was a very huge support back then for Ethereum and it had some rally between $400 and $600 before the bull rally. Nevertheless, going back to $400 or not, the most important thing is buying more when it does, but I doubt if it will. I feel worst we can ever see for Ethereum should be $600.