I think in a few hundred years the very small number of survivors of humanity will be living in caves and huts in the high Arctic and in a greening slowly-reafforesting Antarctic, they'll be hunter-gatherers with maybe some simple small-scale unmechanised agriculture, and they won't have money. Maybe a barter system for a few.
Among the many other things they won't have is an economic model.
Among the many other things they won't have is an economic model.