please suggest me some best altcoins that can easily give 2x profit if I hold them 1-year.
I suggest you invest in major coins, if you just like one then I believe ETH is the right choice.
One year is a long period of this struggling ETH, once it will start to rise, maybe its not just x2 profit but even more because it was dump as high as 10x from its ATH and therefore it has a possibility that it will bounce back strong too.