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.
We're almost reaching half the year now and barely getting past another zeroes in the prices of the major coins in the market especially Bitcoin. Ethereum could keep flowing still. If bull's burst in the price could happen we can dream off 15k now, but for the behavior of the price it is showing lately it is increasing the doubts of it a bit.