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.
I know your purpose is to profit but how will you act here when you want to choose a certain alt? Like in bitcoin, mostly are holding or like in other alts doing day trades etc, what is your preferred? If holding purposes I see no alts can give you an impact in the long term holding since coins are not distributed well and being used therefore majority are bagholders and whales that can dictate the flow of the price. If day trades or playing with the active price fluctuations everyday, I suggest to look carefully at those altcoin that will established a good volume day by day.
How to do that? It's really hard since you don't have a specific coins to choose. I suggest to look carefully at the price chart volume in those exchange. Make some research about the coin you will see there with an active large volume. After that make now some conclusion. Can't give you the specific alts since they are vary but if you give seriousness in this activity it will turned you to a success.