The future of alt-coins

Now that Bitcoin was taking a dip, many of us looked for alternatives. I am still beating myself, as I just calculated that my £500 spent in January on Verge, on which I made a healthy 100% profit, could have been 1 million in the beginning of January 2018. I had an eye on Verge, Iota, Cardano and Rippple, and I still think there is space to grow. Neo and NEM are showing potential, and my only motto at the moment is : “The best time to plant a tree was 20 years ago, the second best time is now.”
I would be interested to know what other alt-coins do you think have the potential to show some insane growth in 2018.
Thanks.