When Hurricane Karina fucked up the infrastructure for a few weeks about the only thing worth anything was fuel. We turned down cash, gold, and jewelry for car rides with what little gas we had because gold is awesome but without fuel we're all stuck in a relatively small radius. It was literally priceless.

If you think the economy is going to collapse, it's gasoline that will be the top commodity. I don't think it will though, but I wouldn't mind a small hoard of that just in case.