That beast was once alive, but lives no longer; it is about to come up from the abyss and will go off to be destroyed. The people living on earth whose names have not been written before the creation of the world in the book of the living, will all be amazed as they look at the beast. It was once alive; now it no longer lives, but it will reappear. 1
References for Revelation 17:8
17.8 a Dn 7.7; Rev 11.7; b Ps 69.28.