The Critisism section of that Wikipedia article paints a rather grim picture of M-Pesa in Kenya. To me it looks like the people could benefit from a decentralized finance system that is run by enthusiasts rather than by turbo capitalists.
1) I mentioned M-Pesa because it is the largest one in Africa. There are also smaller players there.
2) While there are problems that is specific to M-Pesa or even conventional currency, looking at the landscape of cryptocurrencies some problems, which in my opinion is inherent in how do you define value, are problems that even cryptocurrency has fallen trap into.
