I never used VPN, but i want to. Are VPN really safe? I mean are they so safe that even Police can't track your IP? I know how this question sounds, 
but i don't know how to ask quetion about VPN security in better way..
but i don't know how to ask quetion about VPN security in better way..Yes! VPNs are safe. Big companies or businesses are really the ones using VPNs for security and confidentiality of their systems and operations.
VPNs is not 100% safe , they all say they are not save logs but you never can know
the stigma "I Am Anonymous When I Use a VPN" Thats a lie
Anonymity is defined as not being named or identified. You are not anonymous when you are online, even when using privacy tools like Tor, Bitcoin or a VPN. Every service has at least one piece of information that can be used to distinguish different users, whether its a set of IP addresses (VPN and Tor) or a wallet (Bitcoin).