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.
First of all the reason you seem to get downvoted is the term altcoin, which is very much crypto currency, which has a lot of problems in a solarpunk context.
The fundamental problem currencies try to solve is a lack of trust between parties in a trade. Bascially if you get money, you know you can exchange it for something you want right now or later. So it enables transactions between people who do not know each other and do not trust each other, but trust a the third party issueing the currency. Hence a currency needs to be easy to transfer, so people actually use it, stable in value so people trust it, divisible so people can pay a fair price and recognized, so people can exchange it in as many places as possible for as many different types of goods or services as possible.
The way we usually solve it, is by having a government issue the currency. The reason it has value, is that people living in the country issueing the currency have to pay taxes in that currency. So a lot of people actually do need it. Obviously this require governments and gives those governments a lot of power. However there is another way and that is begging the currency to something, which has value. We do that all the time with coupons and vouchers. The problem with that is that the whatever it is being pegged too, can change in value relative to the entire economy. So if you have your currency fixed to say imaginum and there is only a fixed supply of imaginum in the world, but the economy grows twice in size, you end up with 100% inflation. That was a massive problem with the gold standard btw. It was somewhat fixed, by governments printing more money, then they could actually back with gold. Obviously that is not quite the idea.
So given the options a well run government system seems to me to be better. The good part about that, is that this allows to fund public services as well.
However most currency today is not created by governments today. Instead it is created by banks. When a bank gives you a loan, you get cash and the bank gets a gurantee from you worth the loan. You get cash from the bank and for that the bank gets a gurantee that you pay back the loan. The bank does not use its own money for it, but money other bank cutomers have in their bank accounts. Obviously though those cutomers can still pay with the money they have in their bank account using credit cards for example. So a loan basically doubles the money in the system.
So most money is debt and debt has a big problem in the solarpunk world, as it requires more money to be paid back. Hence you need economic growth and that is a really nasty problem. So making banking illegal would solve a lot of problems.
TLDR: Government issued currency, without banking.
You post starts good, but then gets a few things wrong in the end 😅
For example the leverage banks are allowed to have is more like 1:10, meaning they can increase the money supply tenfold or so. It also doesn’t have to be backed by other customer’s money at all.
Interests on bank loans are also only a small part of why capitalism requires constant growth. In fact the recent years of near or partially even below zero interest rates proove that this basically a neglectable part.
In general, increasing money supply isn’t nearly as big of a problem as some people say, as ultimately money is just a means of exchange with no inherent value of its own, so it it good to be able to adjust the supply easily to account for the real world demand. If you want to read more about that the so called Modern Monetary Theory is a good start.
Personally, I would advocate for the exact opposite: (community) banking without government involvement.
While it is true that taxation gives government issued fiat currencies its primary trust, this is ultimately a coercive methode backed by the threat of violence and imprisionment, which is not something that I can support. It is also only one of many ways to structure a currency and have it being trusted by its users, so I think we will be able to figure out something better 😊