According to the "Revelation" (lets just say the end of the world according to this is literal) The end of the world would come and would start by the earth being ravaged by: disease, natural disasters, war, and there would be an unusual amount of demonic activity. Then the first Antichrist would come. He would be a man of power, wildly popular, and falsely claim to bring peace.
Then the false prophet would appear, he would be able to perform miracles, the most notable? Bring fire down from the sky. After gaining people`s trust he would force them to mark the back of their hand with the number 6, and those who didn`t wear it would not be allowed to buy or sell merchandise.
Once that`s done there would be a showdown between Jesus and Satan, Jesus makes Satan`s army literally dissolve and everyone would go to heaven.
That`s basically how to world ends according to the bible, though I doubt it`s true. But if it is true then it`s already begun. The world is ravaged by war, disease,natural disasters, and the Vatican even made exorcism squads so exorcisms are more readily available to the public due to supposed jump in demonic activity.
I don`t really consider this to be a very serious topic, so just talk about it and if you have any evidence to support or debunk please share.