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.
i think a lot of the things matters. matter is that it has the quality that I am looking for like great functionality, good team, good track record etc. I do some research on the new altcoin, read their whitepapers if what they are claiming is realistic and analyze the future value of altcoin. All of these matters in it and every one who invest in any ICO check all of those things mentioned above because we know alot of ICO are scam and people are very protective to invest in a new coin.