Be careful if you want to invest in ETH.
Well... there is no doubt that the destruction of the ICO market had a negative impact on the Ethereum exchange rates. From an all time high of $1,400 per coin on January 2018, the prices crashed by 95%, to trade at $86 per coin a few months later. But check the movement in the price after that low point. The exchange rates had recovered to around $330 per coin by July 2019, before a bearish movement took it below $200 once more.
The ICO market is still down, and there is no reason to believe that Ether will recover anytime soon. But the big question here is whether the correction is justified or not. Does the ICO bust justify a 95% reduction in the price of Ethereum? I don't think so. I would say that the fair value of Ethereum lies somewhere between $300 per coin and $500 per coin.