I think some coin which is hard capped on the top will be good. Also a limited amount of coins in the millions is quite good. I like Decred for that cause. HUSH also seems like a good coin
The blackbytes. What do they exactly do? Are they the fuel for the economy?
See a video here about making a black bytes payments. That may give you an idea of how it works. Perhaps black bytes take of some day for person-2-person payments that no one should know about.