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.
whenever you want a big profit you should look for potential in the investments you want to make.
for example you can see the real potential in bitcoin (I say bitcoin because everyone can agree on) it is being adopted, developed and the price is rising. and on top of that it has real world applications which is helping it be adopted.
now in anything else this potential may exist but in a different form. for example monero has a good potential since it has anonymous transactions and was the hype of the month a while back.
litecoin has always have potential. now with the segwit it becomes even more.
and many more, you have to find them and go in before anyone else finds out about them.