It was not true, not all coins are literally dying because they perform and execute a well performance in the industry so all things that tells them negative are not true and only intention of it is to ruined their image.
Only some coins show growth at this time, these coins can be counted on the fingers. If you look at the crypto currency market as a whole, then the situation is sad. Many good coins lost 50% -70% of their price and continue to fall. Nobody knows when it will end. 
Altcoin or Bitcoin all dumped below the old high price, but the fact, the price of cryptocurrency is still higher than the past too much.