there are many step in which you can find out the potential of altcoins.
1) go to coinmarketcap check the total supply if total supply is more then the chances of price increase is very slow.
2) if coin is listed on high volume Exchanges like binance bitrex they have higher chance and there 24hour volume is less then 5million then there is huge chance it can increase in 24 hrs.
3) its depend on the team associated with the project how the team work behind on the project. and the partnership with other company
all these factors depend on the potential of the coin
I would agree except for point 3. Most of team are fakes and most of their curriculum even of true people are just fakes. On Linkedin if I am an agent sales, i can become a manager, expert in Ico, owner of properties and so on. No one can verify those information so, completely unreliable. I would add that even point 2 can not be true. Only rich companies can be listed on big exchanges. The richest they are the more fake exchange they do with robots to increase their daily volumes. I like to focus mainly on what's behind the idea of the coin, so technology and marketing.