Post-apocalyptic scenario the only thing that matters most are shelter and food. These paper money, gold, minerals or crypto not gonna matter. It's called post-apocalyptic for reason.
However, isn't that a good thing tho if people thought of crypto more specifically bitcoin as prestigious stuff to show off? atleast the value could go up unlike the iphone for pseudo-rich people which gradually losing its value.
Gold will still hold some sort of value in an post apocalyptic scenario, we as humans have always been fascinated by the glitter of gold and I do not think that an apocalypse will remove our love for this kind of things. Minerals will be a debatable case as some might not be of use in the current state of things. If crypto becomes something that you use to show off to your friends for clout, I think it does not change the fact that they are still social climbers, they just changed the medium that represents them but the state that they are in will never change.