Jesus Christ, all his Angels and those that follow Christ understand that Satan exists. Jehovah God will expose Satan to the world. Almighty God gave Satan the job to be caretaker of the earth, calling him the "anointed cherub" (Ezekiel 28:13-14). Lucifer believed he could be worshipped like Almighty God and exalted himself to be like God (Isaiah 14:12-16). Scriptures explain how Satan has access to God's throne and to the earth. There are no scriptures describing a horned creature surrounded by a fiery landscape, tormenting people for all eternity with a pointed pitchfork.
There will be a future time period when there will be a war in heaven (Revelation 12:7-13). Satan will be thrown out of heaven and confined to the earth as a human. He will be killed as a man and finally destroyed by Almighty God (Revelation 20:9-10).
It is possible to overcome the decietfulness of higher spiritual beings, this being done by the help of Almighty God, Jehovah and His Son Jesus Christ (1 Peter 5:8-10, James 4:7-8, Ephesians 6:11-18).