I think that 2018 will be a good year for ETH and we will see it reach 1k and even higher after that, I think it will close between 2000-5000 at the end of 2018.
In the 2nd to 3rd quarter, maybe your correct to hit 1000 dollars. But I do not think so it will hit 2000-5000 dollars by the last quarter. Let us assume that the fluctuation of ethereum is not always going up all the time. Like bitcoin, it will go down for a while then rise again slowly but surely. But as time goes by, nothing is impossible to change. Lets just see and be happy at the end.