No I don't think every coin can't survive, some will be stopped and some will be brunt. Its not every ICO that will get inventors as they plan. But if an ICO reach its soft cap, i think it should survive.
For a crypto to survive, it needs a goo team set up
Probably no, because as what we can see base on the different performances of altcoins not all are doing great so as soon as the market goes down too much then some of the altcoins cannot survive. Only those who has higher values or those who have great performances can win on the survival of this downfall. Best example for this is the bitcoin.