My favorite Altcoin is ETH due to its unique smart contract technology.ETH is the most high profile among Altcoins.Vital is working hard on further extension of smart contract applications,mean ETH is constantly updated by its developers.on the basis of this development work I can say that ETH would continue to gain higher price and keeping in mind current ETH price chart I can conclude that it will lie between $1k-$2k in the end of 2018.