The ultimate win for a malignant narcissist is to take the whole damn world with you when you go.

If he has information that makes him believe his own end is near, why not give the supreme "fuck you" to everyone in the world.

What would make him feel more important?

Remember the pharaohs and kings who would have their servants, their livestock, their riches, their wives buried along with them?

Remember the serial killers who believed the people they killed would become their slaves in the afterlife?

Remember the family man who kills his wife and children before killing himself?

Same mindset.

He'll be so excited destroying the world that he may end up coming and going at the same time.

He hates us all. He thinks we have betrayed him by not worshipping him fervently enough. He thinks he is the only entity in all of Creation that is important. He thinks he is more powerful than God. He thinks the rest of us were put here for his use, abuse, and pleasure.

The most important thing for Trump is being the most important thing. Rather than lose the game, he will flip over the table and burn the house down.