I disagree, the 6th beast king that was in John's day was the Roman emperor Domitian, which was documented by one of the early Church fathers. The 7th beast king, which John said was not yet, is for the very end of this present world which has not yet come even today. So how could that 7th beast be about the era of Apostle John at Patmos in 96 A.D.? Do the math, your idea just does not work.
Furthermore, we know per the SIGNS Jesus gave in His Olivet discourse, that the final generation on earth is who will see that final 7th beast king Antichrist, because the final one for this present world must come in the era when Jesus' 2nd coming happens.
And still furthermore, that final 7th beast king, the Antichrist for the end of this present world, is to setup the "abomination of desolation" IDOL in Jerusalem for the end of this world, just prior to Christ's future coming to destroy that Antichrist. That is what Lord Jesus revealed in His Olivet discourse and also Paul in 2 Thess.2, and Jesus again through John in Revelation 16 & 19. Why does when the setting up of that AOD matter?
It matters because no such event has ever happened in Jerusalem since the 2nd temple was destroyed by the Romans in 70 A.D., and the placing of the AOD Idol requires a standing traditional Jewish temple in Jerusalem to fulfill that Matthew 24:15 prophecy Jesus quoted from the Book of Daniel. According to the Jewish historian Josephus, the 2nd temple burned down from inside when the Roman army tried to seize it. So they did not place the "abomination of desolation" idol in false worship like Daniel 11 prophecy requires which Jesus quoted to happen at the end of this world.
Only since 1948, when Israel became a nation again, have orthodox Jews in Jerusalem been planning and gathering materials to build their future 3rd temple in Jerusalem. Today they even have the cornerstone cut, and have even tried to place it on the temple mount a few years ago (the Israeli police stopped them, because the temple mount has been given to the Muslims' control per U.N. agreement.)
You are not understanding the Rev.17:8 idea of that beast ascending out of the bottomless pit and goes into perdition can ONLY mean Satan himself...
Rev 9:11
11 And they had a king over them, which is the angel of the bottomless pit, whose name in the Hebrew tongue is Abaddon, but in the Greek tongue hath his name Apollyon.
KJV
Rev.17:8 does not tell us what 'number' of beast king that verse is describing.
Rev 17:8
8 The beast that thou sawest was, and is not; and shall ascend out of the bottomless pit, and go into perdition: and they that dwell on the earth shall wonder, whose names were not written in the book of life from the foundation of the world, when they behold the beast that was, and is not, and yet is.
KJV
Do you see a number 5, 6, 7, or 8 there above? I don't.
But what we DO... see is that descriptor - "and shall ascend out of the bottomless pit, and go into perdition:". That cannot be about anyone other than Satan himself, for he is the "king" and angel of the bottomless pit per Revelation 9:11.
That means one MUST... apply that "was, and is not;" phrase to Satan himself. And WHEN does he ASCEND OUT OF THE BOTTOMLESS PIT per God's Word? I showed you already...
Rev 11:7
7 And when they shall have finished their testimony, the beast that ascendeth out of the bottomless pit shall make war against them, and shall overcome them, and kill them.
KJV
So what's your problem. You aren't having difficulty reading that above are you?
You still don’t get it. The passage, Revelation 17:9-11, is a riddle that most aren’t going to get, and you’re one of them.
Again, for the challenged, the eighth king is the one that WAS, AND IS NOT,
Revelation 17
11 As for the beast that was and is not, it is an eighth but it belongs to the seven, and it goes to destruction.
The king that IS, he’s the sixth,
Revelation 17
10 they are also seven kings, five of whom have fallen, one is, the other has not yet come, and when he does come he must remain only a little while.
The ONE THAT IS, is the sixth king. The passage declares each one of the fallen kings WAS, AND IS NOT.
Again, for the challenged, each one of the fallen kings WAS AND IS NOT.
That means the eighth king was one of the five kings that had fallen. Again, for the challenged, the eight head is the antichrist and WAS BEFORE THE SIXTH KING.
Tell us, if the sixth king that IS, was Domitian, how can this future MAN of sin have lived before Domitian?
The Chapter clearly states the eighth king WAS before the SIXTH KING, who you say was the “Roman emperor Domitian.”
Again, how does your future PERSON of the antichrist live before the “Roman emperor Domitian?”
It makes no sense if it's Satan, because he WAS before the kings of Babylon. God is not the author of confusion, like your futurist dogma.