Filling up your safety deposit box with beans might seem inappropriate. One can argue, however, that it’s a symbolic act. Food is important, and there’s nothing wrong with getting ready for a disastrous scenario like the world running out of food. Maybe it’s a little crazy, but it’s not wrong.
There is just one question: in a time of famine, who would open your safety deposit box? Would hungry bank employees even come to work, to be available for their customers who, by the way, will also be hungry? Would they be so loyal?
The safety deposit box full of beans is a contrast, like using an expensive car for pizza delivery or purchasing a space ship to fly from Vancouver to Toronto to visit your grandma for Christmas.