Very interesting topic! I suspect that ubi isnt enough - there are still problems of unsustainability in the production system and our general relationship with over consumption.
I am all for experimentation though - would be great to get real data from a few different societies.
Yeah, this is my only real fear about a ubi. That it will just enable an unsustainable and destructive system to continue. I don't know what a realistic alternative is, though. I do think, though, that a move away from the primacy of GDP and frankly fairytale notions of what money is and how it works will help us move towards sustainability. I think the cryptocurrency experiment is really important in this, as long as it isn't co-opted into the service of an ultra capitalist agenda.
I personally am very optimistic - there are great solutions being developed and tested all over the world for the myriad of problems that we face as a global society.
Keep developing and testing; stay solution-focused!
I wrote a bit here a while back about some of my thoughts, we are working on sustainable development in the developing world, the path of the developed world might be a bit different.
Great dialogue, will keep an eye on this tag!