Yeah the most important thing before investing into an altcoin is just look into their team, their developers, the community, etc, there are a lot of things that anyone needs to know before investing into an altcoin/ico, it is so difficult for me to have trust in a new project, but sometimes i like them and i believe in their roadmap over all things.  But it always depends, so in top altcoins you only have to look at the charts.