Hola is a free VPN service with over 8 million installs and a 4.9 star rating.
Specifically, the MEW side posted the following on their Twitter:
"URGENT! If you have installed the Hola extension on a Chrome browser and have used your MEW wallet for the last 24 hours, please immediately transfer your funds to a brand new account!
We have received reports that Hola has been hacked for about 5 hours and this attack is to record your activity on MEW. "
I think myetherwallet is not safe, because recently MEW was frequently visited by hackers and the incident four months ago had total 216 ETH stolen after some DNS servers were taken over and controlled. That leads the user to a fake website
I believe that myetherwallet wallet is one of the most reliable wallets. Frequent hacker attacks are associated with the popularity of this wallet. However, in the vast majority of cases, the culprit is the user or third-party services (for example, VPN service)