Given the events in Afghanistan over the last week, it is a great example of where bitcoin could have been of great use to the people of the country. The currency, the Afghani, fell to record lows. Anyone who owned bitcoin was protected and could escape the country with their assets, not worrying about capital controls or confiscation at the border.
Not a good idea though. If people see the Taliban use it (and let's face it, that's inevitable if the common people start using it) it will give bitcoin a bad name that we can't really recover from as long as it's used there.
People anywhere facing an existential threat who can preserve their assets with something like bitcoin would do well to do so whether or not that encourages scum to use it. Let's face it, people protect their assets with USD, Euros, gold, silver etc, just because there are bad people using them too doesn't matter.