For any outsider the ETH crash will be a warning before investing in BTC. I think we'll have less in-flowing money because of it.
That's what I'm fearing too, although the media feedback of the hack until now was limited.
In this case the hack had exactly nothing to do with Bitcoin, only that a blockchain was also involved. The problem lies in the possible complexity of the smart contracts because of the turing-complete programming language.
But every time a hack occurs in crypto-land, Bitcoin is associated with scams and other dubious activities. Most people won't invest in such a risky asset. That's why I already "called the peak" in another thread. The last BTC upswing seemed to have stopped at the same level as the previous high, so a "double-top" may be forming. It's obviously possible that the bull run continues a bit more, but mid-term I think the rally is coming to an end.
And as already was said, not all ETH have to be exchanged to BTC. They can be exchanged to USD directly or - even worse for the BTC price - to BTC and then directly to USD.