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?
Ethereum has more people developing projects on its standard than any other, even Bitcoin. Smart Contracts are not just for ICO's so I think it would survive even without ICO's. I think your entire premise is faulty. The selling that has pushed down the price of Ethereum was not from scam ICO's, it was from large succesful ICO's like EOS that raised their money in Ethereum and then tried to turn it into USD faster than new ICO's where able to absorb the slack. Also ICO investing is not over, so who cares about specultaing about it. You may as well ask would Bitcoin be as popular if it became centralised like Ripple.