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.
ICO is only new idea with good concept but always using crypto as pair to built their performance. Crypto market is always grow with their pattern and technology, so even there's no ICO, crypto will live. ICO fill empty space in crypto market, so market is the leader and market can kill ICO.