Because to my knowledge there are several countries in southeast asia that have not legalized bitcoin. And what is our endeavor for bitcoin in southeast asia to be legal like any other country (which has legalized bitcoin).
Will the impact be positive or negative?
There will be no negative or positive impact in the cryptocurrency if a country will not legalized bitcoin but banning or legalizing it would be. When China banned bitcoin, its price dropped shortly but it also recovered later, legalizing it will push the price up. Here in my country, we have a crypto friendly government and there are already steps made by the financial leaders for the possible legalization of bitcoin in the future.