I believe that Bitcoin in 2018 will cost 20,000 dollars.
But in my opinion, perhaps added an extra zero to the price of the Ethereum, because I do not believe that the Ethereum will cost $ 15,000 in 2018.
I also thought it was a mistake. It seems to me that ETH can not reach such a high price. This is a forecast for those who believe that bitcoin can reach $ 1,000,000 this year.