ICOs have been existing even when the price of bitcoin was not as high as $1000. So for that reason, some ICOs will still succeed and most will rail.
The only set of ICOs that will succeed will be those with genuine team, good products and long term prospects.
There were also projects when the BTC was $1000, but the price did not fall from $20000. Moreover, at that time softcap was not of great importance, and the project would continue with the money collected. The current situation is too different.