Mark of the beast and antichrist was fulfilled in 1st Century.
Revelation 13 “16 It also forced all people, great and small, rich and poor, free and slave, to receive a mark on their right hands or on their foreheads, 17 so that they could not buy or sell unless they had the mark, which is the name of the beast or the number of its name.”
The mark of the beast is not bitcoin/vaccines/id-cards/barcodes or smartchips/implants or anything from the 21st century. It was something relevant to the audience of the 1st century to whom John the apostle wrote because everything was prophesied to happen in their lifetime (Revelation 1:1-3).
We use the Bible to interpret itself.
In the Bible, what else talks about the hand and forehead?
The Passover of the old covenant.
Exodus 13 “9 This observance will be for you like a sign on your hand and a reminder on your forehead that this law of the Lord is to be on your lips.”
The mark of the beast was allegiance to the Old Covenant law !! (passover, circumcision, animal sacrifices, temple, etc)
The mark of the beast was the worship of the Old Covenant system that rejected Christ in the New Covenant.
The deception was about trusting in the Law !!
This was the willful sin of Hebrews 10 that led to judgment.
This is what Paul warned in Galatians 3-5 about people who trusted in the law being cut off from Christ, falling from grace into the curse of the law.
The antichrist was a man who sat in the Temple in Jerusalem as Paul says here:
2 Thessalonians 2 “the rebellion occurs and the man of lawlessness is revealed, the man doomed to destruction. 4 He will oppose and will exalt himself over everything that is called God or is worshiped, so that he sets himself up in God’s temple, proclaiming himself to be God.”
Israel as a nation rebelled against Christ by exalting a mere mortal as their Messiah – the Jewish zealot kings who captured the city of Jerusalem and were trying to overthrow the Romans. They were persecuting and killing Christians all over the Roman empire.
That is why John said that the antichrist was coming in their lifetime. They were living in the LAST HOUR.
1 John 2 “18 Dear children, this is the last hour; and as you have heard that the antichrist is coming, even now many antichrists have come. THIS is how WE KNOW it is THE LAST HOUR. 19 They went out from us, but they did not really belong to us. For if they had belonged to us, they would have remained with us; but their going showed that none of them belonged to us.”
This antichrist was a Jewish leader who sat in the Temple claiming to be God and deceived the Israelites in their last days in AD66-70.
The mark of the beast was the system of the old covenant. Many Jews had fallen away from the faith and gone back to the law by worshipping the beast in Jerusalem (Matthew 24:9-14). The Jewish zealots also minted coins so that nobody could buy or sell in Jerusalem without using their currency and swearing allegiance to their leaders who promised “salvation” from the Roman empire.
This beast was destroyed when Jesus destroyed the Temple in AD70 through the Romans destroyed the city and eradicated the Jewish rebellion as He predicted in Matthew 24/Luke 21/Mark 13.
2 Thessalonians 2 ” 8 And then the lawless one will be revealed, whom the Lord Jesus will overthrow with the breath of his mouth and destroy by the splendor of his coming.”
There is no antichrist or mark of the beast coming because Christ was victorious.
Jesus will come in the future and judge the world, bringing a new heaven and earth for believers to live forever without anymore pain, death, or tears.