Maybe the title isn't as obvious as i want it to be, i wanted to know from people already investing in cryptocurrencies how to decide/research which coin is worth the money and which is not, what does it take for a coin to look successfull, strong code? Dev support? Most importantly, how to decide where to invest rather than taking advice on what to invest into.
The heart of any cryptocurrency can be found in the spirit of its community. Therefore, look carefully at the community.
Just like what other members said above this is the best advice or answer related on your question on which i do really strongly agree on this because seeing the community would really indicate that this particular coin does really have the potential.Those dev,strong code would be nothing if there are no supporters of the project.