There may be a case for tactical use of whatever tools are available to achieve a positive result. Who am I to condemn people to sub-par living conditions on the basis of conceptual arguments...
But please take at heart my previous comment. Climate change may sound like an elite concern but it is not. It is actually representative of our deepest global problems.
The reason that the so-called "third world" still has third world problems is that political and economic systems everywhere ignore environmental and social conditions, focus on resource extraction, enriching a few elites etc.
Some form of digital technology would surely help us solve those very difficult problems or at least make them less painful and unsustainable, but cryptocurrencies is nowhere close to do so. It is simplistic, economically more than naive, has the wrong builtin assumptions about society (complete lack of trust) etc.
In any case, good night and good luck