Where is the data to suggest this? Are you referring to how some countries are making mistakes by pushing away their local traders like India, which makes them lose a ton of potential tax money or is there any survey that indicates people in those countries hold Bitcoin?

So far, what you mean by impact is probably the potential of Bitcoin to get some people out of poverty. That is true regardless of where they live though, but they need to be a little bit lucky since not all of them have the means to start DCA to begin with.