Which cryptocurrency do you think is the sleeping giant and can skyrocket soon?
Trouble with questions like this are, most people will just tell you the coins they have invested in. Either that, or you will get the generic post where they just copy paste the top 5-10 crypto cap currencies.
Unless someone goes into a bit of detail to explain why they have chosen what they have, I would take that information with a pinch of salt, maybe even a bucket.