Hi!
I would say right now there is a lot of easy money floating around the ecosystem. Kind of like internet companies in 1998. In the timeframe of 1-6 months, you can't really go wrong as most coins will increase in value. (Including Bitcoin)

However, in the timeframe of 1-5 years which is what I am targeting. It would be the technology and competence of the developers. Definitely read the whitepapers and play around with the technology.