Demonic possession, demons, unclean spirit, and prophets.
BQ: Demons! Unclean and rotten spirits. Lots of people have been asking me about 'em these days.
Q: Are demons still running amok and possessing people? When will it ever stop?
A: Zech 13:2, 1 Cor 13:8-12, 1 Pet 5:8, 1 Cor 10:13, Rom 6:16
Of importance, "and I will also remove the prophets and the unclean spirit from the land." Satan still walks the earth, and indeed more people follow him as the end draws near, but we have the perfect and complete words of God now, and resurrections, prophecies, etc. have ended. The power to cast out demons is gone, but so are they.
These days, people willingly serve Satan (1 Jn 2:18; 22, 2 Jn 7) and exhibit his spirit so perfectly that demonic possession would be redundant—and demoniacs were cleansed to show the power of God, anyway. The only thing we need to worry about is whether or not we're truly serving God, or if we're deceiving ourselves.