For me, i don't support the ideology that ICOs are killing Bitcoin. Remember, through ICOs most people has got to know about cryptocurrency. Through the awareness creation made by ICOs, the entire crypto space has gone global. ICOs added a new sense of value to the crypto market.
My opinion is the opposite. I think the BTC is killed the ICOs projects. The technology of ICO Token is based on the Blockchain of ETH so that the price of ICO Token is going down due to the decline of ETH's price. I hope that the exchange rate of BTC and ETH is going to recover at the end of this year.