To the bolded I would say that those coins do have strong communities and they do have some utility.  As for their long-term survival chances, I don't hold out much hope.  I would like to think that dogecoin would be around in 20 years, but it probably won't.  Bitcoin, most definitely, and it definitely is so far ahead of the other coins--it's not even close.  So I dabble in trading here and there, but my belief is only in bitcoin.