I think bitcoin will be not dead since there are so many people believe it.
But not sure about other altcoins, now there are some altcoins also have a lot of people believe them, like ETH, EOS, Ripple, Tron... Maybe they will die, but if the project sites create more landing scenes and increases the use of their altcoins, then the altcoin also maybe become the next bitcoin. As you know, the project sites have a lot of money now, they can do a lot of things if they want to.
Good statement, cryptocurrency is like religion. There are no right or wrong. Each point has its own features and instinct.