ICO scams are really hurting Ethereum's price and reputation, and it's very high likely that we will never see same volatility of ICO investments (like in 2017) again because of these ICO scammers.
Let's imagine that ICO investing is now over or it's very minimum compared to what it was before. Of course there could be other types of projects on Ethereum blockchain besides ICOs but their effect on ETH:s price would be minimal, and this could mean that ETH would be only used as a store of value like Bitcoin. Could ETH survive this outcome and some day still recover it's price back to 1000 usd?
i think in that case that you described ETH will not only survive but it will thrive and it will become more stable and interesting for big money and maybe we will see a lot of ETH futures and other contracts on huge fiat markets.