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.
A few countries account for the vast majority of Bitcoin trade volume. Countries such as US, EU, Japan, China, South Korea and Canada adds up for more than 90% of the daily cryptocurrency volume. And Bitcoin is already legal in all these nations. However, change in legal status can make a difference. For example, in China it is forbidden to trade Bitcoin against fiat currency (but trading against USDT is legal). If China lifts this ban, then for sure Bitcoin may undergo a major bull run. From what we have seen in the past, the decisions taken by the Chinese central bank and the government do have a big impact on the exchange rates of Bitcoin and the other cryptocurrencies.