I knew a genius, eccentric geologist that believes we are due for another VERY cold period. He dabbled in a lot of things, including plant genetics. He designed and grew a variety of different crops to grow in cold, dry climates (Ice Age climates). He worked with some university, and they have the seeds stored in some huge buried agricultural vault in Sweden.
He also published a paper that related the price of gold to sun spots - an inverse relationship. (Price of gold high when sun spot numbers were low since the middle ages or something). I thought it a bit kooky - but it makes sense perhaps. Low sun spots equals cooler temperatures equals less crops, more destabilized economies, perhaps more wars fighting for better land, etc. All of which tend to increase the price of gold.
Any chance those varieties are available for purchase? I’m a plant breeder and collector myself, and I’m always looking for hardier, more resilient plants.