Is that the case? Bitcoin if it dies. I do not think the other coins will go well.
My opinion if bitcoin dies then altcoins will die also. Why? because bitcoin is the father of all crypto currency. if the bitcoin value reaches 0 and dies then it means that all of the people in the world has no more interest in digital currency and block chain technology. on which is for me is impossible because the block chain technology is slowly growing and being integrated in our current technology and daily life.
Bitcoin will still be a storage of value.
Bitcoin can't really die, it's a self-sustaining industry for a long time already. Yes, it can lose some or a lot of value, but the network is solid. Other coins are greatly influenced by BTC pric, but as you can see now in ETH, NEO case or utility tokens, they can survive on their own.