Wrong, ETH will be $3000 and BTC will be more than $20.000 just at the end of 2018 
when it is time for 2019, it will start again like btc will be bla bla at the end of 2019...
I think 3k USD is possible in 2020 because no more improvement is possible in this year so we should never expect this much hype in Ethereum but Bitcoin is possible to raise in next year. I believe all the cryptocurrencies are depends on Bitcoin so once it will raise in the market all the altcoins are following continuously. when it is time for 2019, it will start again like btc will be bla bla at the end of 2019...