I never thought about this, but individuals in fragile countries could use bitcoins to rescue their assets in the case of government failure or currency failure, or even if they are forced to leave their homes and flee.
In the future, maybe. As of now - definitely not. Because the majority of countries with economic fragility are usually underdeveloped 3rd world nations.
They don't have the infrastructure needed for bitcoin to be fully utilized. That is why countries with gigantic inflation and weak currency will adapt US dollar instead of BTC.