Countries with good economies usually have developed financial industries. There are many investors in the developed financial sector. The investment community has been popular for decades. From the stock market to real estate, there are a large number of investors entering, so the developed countries are more likely to accept bitcoin.
I believe that those who are from the developed economies are already enjoying the economies of scale in their business and since their return is more, they feel more than ready to invest in any new venture which is why we have members from the developed countries ruling the crypto market.