Some will survive and when they do, they'll be bigger then ever. All the other coins will be traded in the LTC or doge markets only or be forgotten after a week.
You need a strong dedicated coin dev team to survive.
Bingo. A strong dev team and community. Some alt coins are slowly dying and others are swimming upstream. But look at how popular dogecoin is and yet if you are holding them, they are nearly half the price they were a month ago. Unfortunately, so many dogecoins are mined each day, it's hard to get that much new investment daily to at least hold it's value.
Look for alt coins swimming against the stream, and then look at their dev and community.
I am trying to look far ahead and there is no point to tell that altcoins are all going to die.
The reason why we have altcoins and people who use them is that bitcoin is not the apogee of cryptocurrency system.
IMHO, bitcoin was a first step to the era of crypto-monetary system and the second step was born of altcoins. I believe, the third step would be symbiosis of all best in each coin to create a new standard of coins like YES in fiat monetary system.