Also just because crypto can't be spent by most local vendors doesn't mean it's not valuable. Stocks can't be spent either but if you had a traditional bearer certificate like in the old days (paper stock with no owner except by merely holding the paper) it was just fine for trade and people did just that in the Weimar Republic when they had hyperinflation.
Worst case you can just spend the crypto in foreign location, import the goods and sell them locally.