Is Capitalism Dead?

If things go the way have been capitalism will kill itself off at the same time it kills everything else. The way capitalism is currently practiced, with its view that there is an endless source of resources and its excessive wastefulness, I see it as a lame sick horse that needs to be put out of its misery. Will someone please shoot this sick horse already? Where's the guy with the gun? A quick bullet to the head and it's all over. Done. Then we can begin anew.
Our current unsustainable form of capitalistic ideas are out-moded, not in line with reality. Capitalists see everything as infinite: resources, money, the environment - everything. That just can't be true considering we live on a finite planet, where everything has a limit. There is only so much oxygen in the air we breath. Only so much fresh drinkable water. There is only so much of anything and when it's used up, that's it, no more, it's gone-forever!
Why haven't these capitalist figured it out yet, or don't they care?
If someone smart reads this and has the money to implement it, they would be richer than any current capitalist. Instead of burying things, why not rework them into something new. Mine landfills for all the resources other capitalist throw out. Landfills are a gold mines, of a different kind. Organic waste could be mixed with sewage to produce methane gas for homes to use. What comes out could be composted to create a very rich fertilizer. The metals buried in a landfill are in huge demand, especially copper right now.
Biomimicry is the newest hot word and businesses should take note. Nature, although it creates waste, it does not pollute, as all the waste is immediately used by something else. Zero sum.