Choosing any project at all to invest on be it trading, token sale, bounties or airdrops require a whole lot of research and information. You need to see how committed the team is towards developing the project and also how prospective such a project is. This can be found on the project Whitepaper, website and roadmap. This doesn't necessarily mean such a project will turn out successful but at least, it gives you an idea on the kind of 5hings to expect from a particular project.