I am focusing on the article itself, which is if cryptocurrency is feasible to the unbanked, usually in Africa, and if cryptocurrency can solve it. I have explained in another comment why Africans usually can't use banks in genral, and why in my opinion cryptocurrency can't fully solve the problem (
https://news.ycombinator.com/item?id=28736411).
I personally want to understand from people who understands how they do function if they do have ideas to actually do it in a practical way. While the idea presented by the GP is indeed good in the long run, it still doesn't solve the problem that most unbanked people in those areas have only either a basic phone (i.e. purely calls and text) or even none, which precludes the habitual use of cryptocurrencies. I also acknowledged that for long-term storage away from often-opressive regimes, there are solutions available.
However, unless you can give everyone in Africa a smartphone and build the infrastructure necessary to have a reliable internet connection, I cannot say that, as of what I've read, have a realistic solution to everyday use of cryptocurrencies hold well.
Unfortunately, you've just stated something that is frankly unhelpful. I've read the article, I've read the comments and be very careful since that these types of discussions tends to catch fire quickly. I've just pointed out that for realistic use in this case, it is currently simply impossible in inner reaches of Africa. Even 3np acknowedges that costs on dedicated wallets should decrease (https://news.ycombinator.com/item?id=28736599) if Africans will use it. As of now, it's not simply feasible.