I think probably for Q4 2019 as 2018 is 1/3rd through and ETH is less than 700 USD at the moment so 15K is too far off for now.
yeah i don't really believe that it will make such a flight, like you said being at $700 right now makes it a little hard to be on 15K at the end of the year.
i do believe that it will rise but more slowly, perhaps it's also better this way to make it more stable and not go down so hard as has happened in the past.