We cannot predict the end of the world. There are many reasons for the end of the world, including human disputes, natural disasters, biohazards, alien invasions... Our peaceful society may one day collapse without warning. However, the end of the world will eventually come to an end. No one knows how long this period of time will be. Now, let me tell you various ways to deal with the end of the world.
(It's just for fun, I wrote it for fun, maybe it will be helpful to some authors who like doomsday themes.)