i think it's important to protect new cryptocurrency fans on some information like dead and inactive coins as every day new coins are pumping into blockchain market.
here this link will help you identify many dead and inactive coins, so you can avoid being losing your funds
https://deadcoins.com and anyone have more to be added can let us know.
is it true that the target of all the altcoins that are dead right can be seen from there? if it's true it will be very helpful to find out the coins that are dead. and there we can judge coins that will potentially die and analyze further why the coin can die.