CNBC: For many Afghans, this week has laid bare the worst-case scenario for a country running on legacy financial rails: A nationwide cash shortage, closed borders, a plunging currency, and rapidly rising prices of basic goods. In some ways, it’s a perfect test case for the usefulness of bitcoin and other cryptocurrencies. CNBC spoke with several Afghans who are using crypto to learn how they got into it, how it’s helping them, and barriers to further adoption. Click here to read more (external link).