Things like permaculture and sustainable farming sound very romantic but you must not forget the huge overpopulation. If you account for the amount of people living on this planet, there is no such thing as sustainable farming. You'll have to decide whether you want to decrease your crop yield by farming "sustainably" and protect the land, or farm in a non-sustainable way, just to be able to feed the world.
And the fertility of the soil isn't our only problem. The greenhouse effect, the overuse of antibiotics and the depletion of the planet's resources are just some of the problems. It's easy to throw glamorous words like crypto and crowd sourcing into the conversation but until some of the aforementioned problems are actually being solved, those terms remain nothing but a philosophy to me.
It's easy to make claims and I know that the internet is full of those, but sometimes it is important to do some "back-of-the-envelope" thinking to keep the conversation realistic.
RE: More about the Earth that is "just right" but likely to expire soon...