Peak Credit: not verifiable as it is a renewable resource
Peak CO2: again it is a renewable resource
Peak Water: again a renewable resource as you cannot destroy it necessarily faster than nature can regenerate it from water vapor

I am commenting only to remind people that words matter and their misuse can weaken arguments that have a significant factual basis.

So you have to ask: Can the resource renew itself? Can the resource go extinct?

Credit is a good example. The concept of credit would have to go extinct as there will be more and more people added to the population in the coming years, so potential credit lines would increase along with it.

What's important is the rate of renewal. For example, the Oglala aquifer took millions of years to fill, but we've drained 10% in a half-century.

Freshwater resources are becoming more scarce, and the situation is approaching disaster proportions in places like the Murray-Darling basin and the Western US.

For more information on freshwater depletion, see:

http://earthwatch.unep.net/freshwater/index.php
http://www.gly.uga.edu/railsback/CTW2.html

Peak Credit: not verifiable as it is a renewable resource

Economy is powered by energy, not by money