I haven't had time to fully read this article or comment on it, but it looks interesting to me. The first thing that struck me--and, this is typical of many articles written by academics--is that the author is writing about the capitalist system but is unable to name it. He writes around the subject by using phrases which really refer to capitalism without naming the system. See if you agree.
It should not be surprising, since the profit motive has been the primary driver towards these peaks, that we should be approaching a peak in the realm of money as well, a peak that we might call "peak debt." The crisis in money is ineluctably related to the crisis in everything else, because the viability of our money system depends on growth: the conversion of nature into goods, and relationships into services. This conversion cannot proceed much farther, due to resource depletion and the inability of society and biosphere to sustain more damage.