Do you think these rumors are real? I tend to think yes and I think this will happen soon.
To be well understood, I believe in Ethereum's potential (even though so far I have lost money investing in Ethereum, but I notice that it is still a good project and this will makes it to explode one day) and I still believe that by the end of 2018 it will have an increase of thousands of dollars, but at the same time I feel that it will drop much more than it is now before starting the growth again.
Not sure that it may drop to 400. Negative news may effect it, but ETH is demanded almost in every ICO - so such price decrease is not very likely. Even if it drops to 400 I am still bullish on ETH in the long run.