for the end of 2018 it doesn't seem like, I see ethereum this year trying to get back to $ 200 is very difficult and I think they will be able to do it next year
Right, most probably around $100-$120 would be the price ETH will reach before the end of the year. But don't be discouraged though, its still a perfect buying opportunity. Just imagine buying just 1 ETH today and then let it grow to x10 (its previous all-time-high), then that's a lot of profits.
Might takes years though but I'm sure it's worth a gamble at this point because we all know that ETH has still a bright future ahead.