Any form of adaptation will result to bitcoin price pump. I think if other countries that banned bitcoin will un-ban it, it will make a huge diffident to the price, because what we are targeting is mass adoption.
Every country have a local exchange in terms of bitcoin, this is a big step in mass adoption.
Do we actually have countries that have banned bitcoin? because what I have seen is countries threatening to ban it, some speaking against it and some not just saying anything about it, but I have not seen one single country that has, china had once threatened to ban miners and not crypto which we can see how they are working towards theirs.
India planned to ban it but still in the court for that and many citizens are just still using the cryptocurrency, the united states where trump openly came to speak against it never talked of banning but only spoke against it as being an unregulated asset which means there is chance that it could be regulated by them which I feel that is what they are trying to achieve already through Binance exchange and Coinbase.