The world is going to go out with a bang. Some sort of totally epic apocalyptic scenario, be it zombies or nuclear warfare or who knows what else. At least, that's what movies would lead us to believe, and are movies ever wrong? No.
The strategic thing to do, knowing these inevitable end times are on their way, is to build an underground bunker where you can live out your last days in peace, or await rescue, or whatever. Basically, you should build a cool bunker. Just like this YouTuber did. It's awesome and will make you simultaneously incredibly jealous and eager for the world to end.