Not all altcoins will survive. As far as I know only the strongest survive in crypto. The more obstacles to face the more chance that there will altcoins that will instantly end the campaign.
do you mean there will be altcoin that can end the campaign how ?
because I think the new altcoin is part of the campaign prize for which we follow his ICO project. I think as long as there is still a campaign, there will always be a new altcoin