People do use a vpn for their security and privacy needs. But most of the times the IP a user is using is shared which means there could be a whole lot of people using the same IP address for their use.
A dedicated IP is something that is much more beneficial, since it is only you who is using that IP for your security, privacy and anonymity also protects you from a DDOS Attack.
The thing to note is that not many vpn service providers provide you with the gift of Dedicated IP for it's users.
Well, in order to find out more about dedicated IP, how it helps the user, and which vpn service providers do provide with the dedicated IP service: Here is the compilation of the Best VPN with Dedicated IP
It is a recommendation to use a dedicated IP if you want to have a secure and private life over the digital environment.