It also lasts forever. If you have room to store it, there's no downside to stocking up when you have the chance. And since everyone else is buying lots of it a

It also lasts forever. If you have room to store it, there's no downside to stocking up when you have the chance. And since everyone else is buying lots of it as well, there's an obvious upside--if you don't buy it today, you might not be able to buy it tomorrow.