Actually some altcoin more promising bigger profit than Bitcoin because some of them going up stronger than Bitcoin and the price still cheap , just like Raiblock the price was $0.2 and in about less than 2 month the price pump to $32. Crazy pump!
In 2018 I think any altcoin will be just like Raiblock.
My perceptions also say so, Look at it now Bitcoin is down every day. And precisely altcoin is very rapidly its rise. It is true you think that we should hold on to altcoin but it goes back to the decision or the right of each person.