There will be no currency difference, yes, but more importantly, over a billion of people will be included in the global economy. Those who are underbanked or completely unbanked can now participate thanks to crpyto. Of course, the arrival of regulations that would make Bitcoin legal is only the first step, and people then must actually be willing to adopt it and use it. They need to be educated about it. There is a lot more to do, even after the legal issue has been handled. Which, by the way, needs to be done throughout the world, as a single jurisdiction or even a few of them won't be enough.
Really? A billion people? There are about twice that number of unbanked people and yes, most of them are like this simply because banks cannot give them accounts, because they either do no live near facilities or they even cannot have status like us normal citizens.
But I don't think crypto is the automatic answer for them. You think they can use Bitcoin easily if they cannot use normal money easily?
We may not hit a billion people but with legalization at hand we will expect tremendous increase of people who will join into the bitcoin community. We may not reach a billions but a million additional users all around the globe is a very big thing for bitcoin. Though we cannot have all people in the world gain access and use bitcoin but at least we can start wit the urban areas and that will be the start of bitcoin mainstreaming. Not only the adults will use if but soon their offsprings and thus in the end we may just hit that billion account in the far future.