No, this man is not possessed and how can Satan posses himself.
Rev 13
The beast rises up out of the sea as the sea here is symbolic of people and nations as in a sea of humanity, Daniel Chapter 7:1-8;
Revelation 17:15. This beast out of the sea is a Luciferian empire system starting way back with Nimrod and the Tower of Babel and the establishment of the Babylonian Empire continuing up to the last of the seven remaining nations which is the Roman Empire that received a deadly wound in 1798, but the wound was healed in 1929. This evil system is what gives its power and authority to the son of perdition, the man of lawlessness who will literally take his seat in Jerusalem exalting himself above God as he claims he is God,
2 Thessalonians2:3,
4.
Their agenda includes total global control over political, military, economic, educational, religious and environmental systems for the deceptive purpose of ensuring global peace, prosperity and order during the timing of the seventh trumpet. The first six trumpets are Gods chastisements on those who refuse to repent and turn back to His grace. The whole world will be thrown into total chaos and fear as everyone his brother will turn on each other if they have not the love of Christ in them as there will be little to no resources left for survival and man will do anything in order to survive. Many will be seeking a savior type in their time of distress an uncertainty as they will bow down to this false god/son of perdition/last antichrist that will promise them provision and safety, but yet rejecting the true Savior Christ Jesus,
2 Chronicles 7:14.