What do you do when you know the end is coming? Make sure you are prepared.
Now, there are multiple ways to prepare for the final fight, of which, I have two interpretations for this strange theft. The first is more likely, but less heart warming.
Knowing the end is coming, and needing to finance the purchase of weapons, survival gear, and vehicles, a band of survivors steal millions in maple syrup to finance their end of the world survival buying spree.
Hmm, they have lots of pancakes in their survival bunker?