That's a pretty good question given all of the scenarios that seem to be happening right now.
Personally, I don't worry too much about the end of the world. For me, worrying about stuff like that is the same as worrying about whether or not a bus will crash into my bedroom while I'm sleeping, or if a moose on a rampage will attack me while I'm at the grocery store. Sure, there's a very remote chance that those could happen (and by remote I mean I have a better chance of winning the lottery ten times, using the money to buy an island, and finding out the island is really made of solid gold) but it's not very likely to, and even if it did, there's not much I can do to prevent it from happening.
I prefer to live my life rather than fearing the end of it. It all seems scary when you start to hear all of the horrible thing that would happen, but I think that spending my whole life worrying about the end of the world would keep me from enjoying the world!