We need altcoins as long as we interact economically over the net, with people we do not know (or simply with people outside our local communities). If we try to imagine what qualities a “solarpunk coin” should have, what are your thoughts? Do we know any existing coin, checking all boxes? This question is more about political economy of Solarpunk, then its technology.
Its not very cognizant of you to assume that poor people dont/cant save money. Youre implying that they are poor because they dont save or youre implying that they just cant save because of how poor they are which is mostly untrue.