Most of us are afraid of something, whether it's some kind of massive catastrophe, or perhaps something that doesn't make any sense at all.
In any event, there's good news and bad news. Wait, let me rephrase that. There's bad news and worse news. The bad news? Your worst fears could come true. The worse news? There's a whole world full of other stuff that can mess you up.
If you want to add to your paranoia, this r/AskReddit thread has you covered.