The exclusive crypto currency thing is alarming to anyone who has ever grown up with grandparents who were around for the whole "Miners script" wages thing. Being paid in fun bucks that are only good in your area leads to complete control of your life by those who runt he currency. Miners store only shopping was a constant swing of nothing but the cheapest junk available sold in bulk to those with scripts. The script printers would enjoy all the nice interest of their real money and the options to invest and grow it while those on script were fun buck to fun buck lifestyles. Miners houses became a thing which meant the mine owners could take out building loans, skim them for profit and make cheap houses that came in under loan budget that they'd charge script users a higher percent interest on than the bank they got the build loan from themselves thus letting them both skim borrowed funds and interest from your premiums paid.
Seriously...dont go for a crypto coin currency for an entire city as its only means of commerce. Especially since such currency also adds an entire new host of concerns and pitfalls in addition to all that shit I mentioned that occurred to miner familys during the day of miners script commerce.