Black markets are underrated and the social stigma around them is unwarranted. ZCash is about financial freedom and this is exactly what black markets are about too. At core they allow individuals to undergo peaceful and voluntary transactions. Moreover, they are the ideal niche market for a currency-attempt because the fact that the goods exchanged are “illegal” (not necessarily immoral) justify the high-friction use of a crypto-currency like ZCash (in its current form: slow finality, potentially high fees etc.)
I don’t know much about modern dark-net markets but I remember Silk road. I am curious to hear your thoughts on the issue. In particular, we should focus on:
Market research: what are the largest online black markets?
Usage: what crypto-currencies are these markets using and why?
Solving: how can we “convince” them to switch to ZCash?