Such a graph could be misleading, and I agree that there's no information about magnitude. But I don't think it's actually misleading in this case, and we have

Such a graph could be misleading, and I agree that there's no information about magnitude. But I don't think it's actually misleading in this case, and we have other information available that clarifies that there is not a single Vietnamese cryptocurrency user in the world (and, I guess, 0.37 of an Indian user...?). There is a measurably large amount of cryptocurrency activity in the world, but most of our (or at least my) awareness of it is as a western techno-futurist/financial/cryptobro phenomenon. This graph is really useful in demonstrating that that's not a very accurate view. It would be very bad if it were the only datum on cryptocurrency the reader had. But that's not the audience of this article.