cash out

Source: We have cashed out property and we have grown our money so much that we now stand in a real danger of undermining hope---running down resources, cutting down rainforests and spilling oil into the Gulf of Mexico, changing the climate---the only thing that has remotely slowed down the relentless rise of carbon emission is actually recession.
So what does"cash out" mean here? Can you help me out?

What's your source, Angelya? Could this be an automatic translation?

It's from my translation material, but its source is Tim Jackson's speech in Ted.

I've just listened to it on youtube. The quote is incorrect.

The irony is, though, that we have cashed out property prosperity, and we have grown our money so much almost literally in terms of money and economic growth. And we've grown our economies so much that we now stand in a real danger of undermining hope.

I suggest you use the video and not the version you've been given.

In any case in BE 'to cash out' means to sell an investment (Cambridge) . Obviously, this is used ironically here.