The primary purpose of an IP hider is privacy. Using a cracked version defeats this purpose, as the "cracked" software itself may be monitoring your traffic or redirecting it through malicious servers.
For maximum security and speed, industry leaders such as Private Internet Access (PIA) or Mullvad are highly recommended by the privacy community.
Pirated software cannot receive official security updates, leaving your system vulnerable to newly discovered exploits. Safe & Legitimate Alternatives