to make profit you have to buy something. why should i buy 0.01 BTC when i can buy 15'000 ANTI.
Because 1 year from now BTC will be worth something and ANTI network will be dead.
Only half will die? You are being extremely generous.
My guess would be that 95-99% of all altcoins created would die. Most people who create altcoins are in it for the money. But select few with active communities and developers would survive.