There are many factors that affect it,Due to different problems or different reasons of each government agency in the world.Yes indeed there are some institutions that have common thoughts and principles that are approved by each government or country.But in these modern times,these agencies only regulate the lands and oceans of each country.Yes we do the World Bank who somehow has the power to regulate the world's cash flow. But in the case of bitcoin,there is no government joint agency that regulates bitcoin flow.