True, though just for a bunch of small groups of people, out of the 7.7+ billion on this planet. We are restricted to "pilots", if you look at the world at large.
What can catalyze basic income for all? I bet creating a channel for it to flow where governments aren't that advanced, yet. Only then will people start feeling what it means to be recipients.
How many inhabitants does Alaska have compared to the world population? (less than 0.01%) How many recipients will Andrew Yang have on his donation-based plan before he can convince the government in 2024 or 2028? (not sure)
How many people in the US compared to the world? (4.25%)
I'm talking of this happening on a worldwide scale in 3 years rather than 3 decades. And the limiting factor right now isn't the availability of money, but the lack of a channel.
Sure, governments need to be involved for it to be stable, but right now it's simply too high stakes and they simply won't do it.