Well, I’m not sure what you mean, but if it’s that, in the post-modern era, Christianity has outlived its usefulness and even lost its former meaning, many people would not disagree. Is that a transition or a crisis?
Christianity is not a teaching - it is a relationship with the person Jesus through the Holy Spirit. Christianity is eternal because it is not a religion, it is faith in a living and eternal God.
As much as it may, the world will NEVER wipe out Christianity.
Now I say to you that you are Peter (which means 'rock'), and upon this rock I will build my church, and all the powers of hell will not conquer it....Matt 16:18