There are generally three positions that are held by believers on Satan and demons.
View 1, Do not believe that Satan, demons, and unclean spirits are real spirit beings, to them there is no such thing, not now nor was there ever.
View 2, Believe that Satan, demons, unclean spirits are real spirit beings are still very active today.
View 3, Believe that Satan, demons, and unclean spirits are real beings, but were all defeated and destroyed in AD 70 at the return of Christ when the judgment took place.