With the fallen angels being chained up in the lowest part of hell until the day of judgment because they went into women and created a race of giants, where will the demons who are the evil spirits of the deceased giants end up during the millenium when Christ reigns on Earth for 1,000 years?
According to Luke 8:31, the legion of unclean spirits that the Lord Jesus cast out of the man in the country of the Gadrenes begged him not to command them to go out into the deep. In the Greek Interlinear Bible, "the deep" in Greek is "abysson" which means "abyss." So they very likely knew where they would end up in the future, but did not want to be sent there ahead of time. Satan will also be chained up in the abyss during the millenium.