While you do not need one to use Popcorn Time, fast, secure data encryption is highly recommended for anonymity. Popcorn Time uses the BitTorrent protocol. This causes red flags to point right at your local IP address if your connection is left unprotected.
The encryption provided by a virtual private network makes your network activities invisible to all prying eyes. Even your ISP and government agencies can no longer see your online activities when connecting through your Surfshark VPN app. Get protection, or they will probably contact you to discuss your activities.