I read all these threads about coins becoming officially dead. However, most of these threads are FUD. When does a coin become official dead? Is it when the developer stops developing? Is it when the coin stops trading on major exchanges?
One factor is when they removed from the exchanges.
Reasons for that is the low volume established in that particular altcoin. Also even there is an active development that is currently running on the coin, as long as no volume was present during a certain period of time then it's a reason why they are removed. No investors = Dead Coin. But it should be on all altcoin exchanges and not only one a single one.