Is Hola safe to use? No.
“While analyzing Hola, Vectra Threat Labs researchers found that in addition to behaving like a botnet, Hola contains a variety of capabilities that almost appear to be designed to enable a targeted, human-driven cyber attack on the network in which a Hola user’s machine resides.”
The United States Sanction Russia in Response to Cyberattacks
President Biden Issues Sanctions Against Russia For Cyberattacks, Election Interference
Russian Foreign Intelligence Service Exploiting Five Publicly Known Vulnerabilities to Compromise U.S. and Allied Networks