A country's currency credit comes from the real economy, and bitcoin has too little to do with the real economy.
If a government will value and support more of bitcoin instead of their existing currency. Whales will fly to their country and can easily manipulate their economy. How ironic that we are telling that bitcoin is the future currency but with this type of situation we are likely to stop the innovation if there will be a country that will start getting serious with bitcoin. But I don't think that this will happen, a government won't allow this to happen. They can still support bitcoin/crypto but it won't come to this point.