Surely, many ICO will die quickly in 2018, since most are badly designed and managed.
But at the same time many others will be born and prosper.
So, it's just about choosing carefully.
I would say that 90% of the ICOs will die, since they are scam and unable to make a profit, but the 10% that will remain will be very successful.
As long as there is a coin that can do its thing then there should be a huge amount of support for it. ICO's fail when there is no money in it.