I did not think that ETH would go below 200$ again ever.
I also have the feeling, that we will see another drop in the near future.
But no one knows of course.
No one will predict how long the price of ETH will increase but we don't know whether it will go down even deeper. But surely it will show efficiency in the coming days.
you are right that its very hard to predict eth future price value
but i think eth is in deeper stage already because it all time high price was upto 1200$
and now its price is only 221$ and 170 $ it lowest price in this year 2018 for now
it will go up by my point of view and very very less chances to go down from 170$