There are more than 700 coins, almost imposible to study all of them, so I'm thinking It would be a nice idea to share those coins with great potential that are hidden under so many shitcoins, vaporware and empty shilling.
I doubt that there are actually any hidden gems that can skyrocket. I mean, when you say hidden gem I have in mind some for now random and unknown coin that probably doesn't even cost a cent. If it's been few months after their ICO and they are at that few cent mark, that means that they have already failed and the developers are most likely enjoying free millions and have dumped their tokens very quickly. The fact that there are so many new coins doesn't help the others. It creates a big mess, that no one can benefit from. Most of these coins won't survive in 2018.