I suppose you could varnish it and mount it on a plaque. It's too big for a good-luck charm on your key ring.

I suppose its edibility depends on what fats, if any, were used to make it. Most will go rancid over time. Even the natural fats in whole-wheat flour go rancid. But if it's just white flour, baking soda and water, and there's no mould, and you're hungry enough, you might just eat it and survive.

I think the ship's biscuits of old were fat free, except for the weevils. Tap it and see if anybody has taken up residence. Sea ditty optional.

Have you done a "sniff test" yet?