It will drop to 500$ in the June - July, but will up to 2000 in the end of the year as BTC price goes up
My prediction is Ethereum price will not drop back to $500 anymore, it'll start to grow up and return back to $1K level, it's possible to reach $2000 in the end of 2018, but no more than $2K
It is very realistic scenario for me. Yes I think that Ethereium will be on the price level 2K$ this year. But i'm not sure that we will see 500$ for ETH before this rise. Maybe today the best time to invest.