That's really only something that you could weigh if you wanted to take the risk of not having a restore point
to gain additional HDD free space or not.
If you keep updated system images, then you may not need it.
If you would like to have a very quick way of undoing a mistake made to system files or the registry without having to do a system image recovery, then a restore point could be handy to have. In addition, system protection could help you restore previous versions
of files in a pinch as well. Such as accidentally deleting it.