If my home were burning, it'd be because I set it on fire. One of the lovely things about living encased in steel and concrete is that napalm becomes your universal pest control and cleaning solution. If an actual fire, probably involving large amounts of thermite, somehow managed to start down here, the ensuing secondary munitions explosions would wipe everything out faster than you could run, anyway. I order ammo by truckloads. In fact, next week, I have three truckloads scheduled to arrive for National Ammo Day.
Because anything worth buying is worth buying in bulk. It's cheaper that way.