I'm half looking forward to it. First off there's going to be a lot of 'End of the World' parties. The 21st is a Friday so it will work very well. If there aren't people out there even now working out how to make a killing, sorry I'll rephrase that, make a lot of money out of it. Then I'll be surprised.
I love watching documentaries on the subject, apocalypse and all that. I treat them like a movie. Fun to watch, food for thought. But not something to take seriously. Inevitably there will be people who will take it seriously. They will hide away or shoot themselves. But in truth nothing they do can make the world end. So I won't be worrying.
But it will be hyped mercilessly getting close to the time.
The whole end of the world mythology is a bit sad really. There are any number of variations on it. All silly and based on a lot of deluded thinking.