Let the data speak: $ETH 2238.26 (24h -0.13%)
Now for the news: A hacker swapped 1,670 ETH for ZEC, worth $3.73 million.
On the surface, it looks like a negative factor. How much damage it actually does remains to be seen—the market will tell. The most direct way to judge is to check whether trading volume really changed before and after the news.