ETH fork can become one of the right catalyst that we all are waiting for.
It would definitely have a huge impact on the ETH price, as it is happening to transform ETH into an updated version, which helps it to grow. We may expect that Ethereum price going high and the other cryptocurrencies might suffer a downfall for a short period of time during hard forks. Ethereum rose by around 85% over three weeks time.
But it will positively affect bitcoin in my opinion. Just look at the price, bitcoin is above $4K with no significant news around it. So in my opinion, the ETH fork has a positive effect, not in the long term though. But it good to see the price of bitcoin just barely above $4K again and do hope that it will maintain at that level as it looks like we're facing a huge resistance.