Anyone who takes the book of Revelations as actual prophecy is a moron. Anyone with half a brain who reads it can tell that the author specifically intended to refer to the Roman empire. Every sign was intended to show that Rome and his emperor were millions of Satan and that the emperor was the Antichrist
Anyone who does NOT is deluding themselves, as all that is revealed has not been fulfilled. There have existed many antichrists. Hitler being a prime example. Each attempts to supplant CHRIST and is manipulated by Satan. However, these earlier versions are precursors to the ultimate ANTICHRIST who is yet to fulfill every prophecy concerning himself in the entire Bible. He may exist presently or is yet to be born. My guess is that he will be of Jewish linage, in his early 30's, and will come into full power as a result of the RAPTURE of CHRIST's CHURCH (the BODY of ALL TRUE believers). There will be such panic and chaos among those left behind that he will be able to step in and claim to be the messiah himself and most will believe him (at least at first). He will assume WORLDWIDE domination. After about 3 years, this will likely begin to change as he begins to reveal his full intent. The TRIBULATION (also known as THE TIME OF JACOB's TROUBLES) will last 7 years. At the end of that period CHRIST and HIS CHURCH will return to destroy this ANTICHRIST and cohorts. Satan will be locked away for 1000 years. And the CHRIST/MESSIAH and HIS CHURCH will govern the inhabitants of earth forming the MILLENNIAL KINGDOM. The lion will lay down with the lamp and small children will not be hurt by vipers.
At the end of the 1000 years Satan will be released and will again delude the populous to revolt and this final battle will be at ARMAGEDDON. Satan will be tossed into the LAKE OF FIRE for all eternity along with all who sided with Satan. This will be the FINAL JUDGMENT. And a new or renewed heaven and earth will be formed. And this is where everyone who loved the true MESSIAH will live forever. I believe there will be interstellar travel, and everyone there will be find complete joy and peace with JESUS the MESSIAH.