2 Thessalonians 2:3-4, 9-10  Let no man deceive you by any means: for that day shall not come, except there come a falling away first, and that man of sin be revealed, the son of perdition;  (4)  Who opposes and exalts himself above all that is called God, or that is worshiped; so that he as God will sit in the temple of God, shewing himself that he is God. :  (9)  Even him, whose coming is after the working of Satan with all power and signs and lying wonders,  (10)  And with all deceivableness [deceitfulness] of unrighteousness in them that perish; because they received not the love of the truth, that they might be saved.

There are and will be many type of manifestations that preclude the revealing of the ant-christ, one of which will be self professed Christians apostatizing, or leaving the faith. 

The devil will manifest hisself in ways that will exacerbate the falling away, such as:

False prophets, miracles that  exalt man above God. Initially, they will appear to be verbally glorifying "God", when they will actually glorifying THEIR god, Satan, and he will make it seem their status with (a) "God" is the reason these signs and miracles are able to manifest. There will continue to be more and more worldliness and the de-valuing of God, Christ and His word from Christians. Sin will be more and more justified, glorified and acceptable. Man will exalt himself above God more and more. There will be stronger and stronger occult, witchcraft and pagan worship accepted and sought after in our societies, and so on. 

Those Who Do Not Abide In Christ,  Will Wither, Die, And will Be Gathered Into The fire and  Burned.
- John 14:4-6
But Only Those That Endure Until The End Will Be Saved.
- Matthew 10:22, 24:13