I’d put my bucks on tulip bulbs if we need to face world ending disruptions. You not only can eat them raw they have a very long shelf life. Their price zooms up into that of multi-carat diamonds under such conditions (1943 Zuider Zee and nearby flooded lands ~ they had a famine also).
I suppose wheat and beans would have also commanded very high prices.
You have to plan ahead on these things.
BTW, I've met and talked to people about their experience in the 1943 winter and the bombing of the dykes.
Do you know what refugee relief is like in an occupied country with the Nazis in charge? It wasn't pretty.