Really friggin' neato.
I've been thinking someone should ICO a coin which is basically just this but then build a drug-market exchange into the thing itself. If you can do trustless transactions + have anonymity doing transactions then the system would be really hard to attack. You could make a little cut iOS front-end for it too!
Here's to DrugCoin being the world's leading currency in 2020! Jai. Praise Jah.