I am completely convinced that some combination of catastrophic climate change, world war, economic collapse, rouge A.I., unforseen natural disasters, etc are going to doom humanity. I am staying alive because I want to see how bad things will get. And so far I have not been disappointed. If things ever got sufficiently bad to the point where death was imminent for me regardless I might consider blowing my brains out with a shotgun. But until then its a morbid fascination with the world that keeps me going.