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.
It is always important to have up to date information about what is happening in the market so this could be useful for some people but it is very easy to see that a coin is completely dead if you take the time to look at the volume of the coin, if you see a coin with very low volume or with no volume at all then you know that coin is not traded by people and that no one is using it for anything so I really cannot see the point of a website like that.