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Venezuela could provide a real world example of how bitcoin would fare during a financial crisis. The venezuelan native currency (the bolivar) is currently hyperinflating. The entire nation is bordering on economic collapse, despite being rich in oil. Still venezuelans mine bitcoins and find ways to buy/sell using crypto currencies, some are doing well with their crypto mining enterprises, earning a decent living for themselves under circumstances where they otherwise might not be able to.

That's probably the best case example I can think of, although there could easily be africans, cubans and others currently not living under the best economic or living standards for whom bitcoin is something of a savior.