Tuesday, September 5, 2017

My mathematician grocer is saving his customers ATM fees

He has an efficient method for running the tab, and we keep our tab within bounds.  The items we buy are easily counted bottles of liquid, mostly, so the grocer can jot the prices easily.

Here is a market.  Our smart cash cards can do this automatically, no need for coinage just run a straight stock vs deficit using stable prices.  The smart card can tap and go, covering pay offs as needed. What is the likelihood that his known customers will hack the cash card and cheat? Zero, the grocer still exchanges with the bank in crypto dollars.

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