Its an interesting article but......
I have a hypothetical question.
Ok this "system D" economy can only exist because of the restrictive monopolistic nature of the global (legal) economy.
So what happens when the legit economy collapses? Would the system D economy then become the main economy that rules the world? Or would it just go down the toilet along with everything else in the collapse?
The future is a big ball of 'guess' so I probably won't be entirely accurate. My observation so far is that System D won't collapse as it is built from a much more solid base than the crumbling mess the traditional nationally-based economic network is resting on now. Instead, it will supplant that contemporary economy with a much more genuine one-world economy; possibly even a one-world currency (Bitcoin?). Somalia's economy
is a particularly interesting model of these events.
With maturity of the global system, there'll be efforts to control it. Overall, a general balance will develop that should preclude any single force from fully dominating all. In addition to that, increased incorporation and reliance upon computers, various technologies and the resulting software is moving the reigns of control away from human fallibility.
If there is going to be turbulence with assimilation and harmonization of disparate cultures into the global community, then System D could experience a few cycles of growing pains before settling. By following the course humanity is on, we are effectively creating a cocoon. Beyond that stage, it's hard to even make an educated guess about what's next.