The idea of sector specific coinage is interesting, however I have several questions about it.

How do you ensure they are easy and cheep to exchangeable, would I need to exchange my "techcoins" to "dentalcoins" every check up, and to "greenerycoin" every time I want to buy some veg?

Why would I use these coins over a globally acepted one like BTC, ethirum or steemit?

Using sectors specific coins how do you design a mining method that aligns producer-consumer interests?