1.5k dollars this year would be very good in my opinion, 15k dollars is definetely too much in my opinion...
I would be really happy with 1.5k worth for Ether before end of the year.
I think next year, for now we are still on bearish i believe we will back to bulish at next halving 2019/2020. Yeah 15K$ For ethereum its really to much idk how much marketcap we need to reach that price