I don't just trust new altcoins immediately. I find it more convenient if I hear a lot of good feedbacks from other people who already risked using it. A good altcoin will definitely be the content of a lot of threads in here. I read a lot to know.
Yeaa not much we can do to verify things technically , just do your own research by reading isn't a bad way.
Rather than make a baseless speculation picking altcoins randomly etc. Know the core developer , are they have a lot of supports since the announcement and what the mission behind altcoin invention could be a little example to take it as a serious consideration.