I've proposed doing this for cryptocurrency, but mostly to be immune to line-go-up behavior. Line goes down. So anyone holding these Beenz is encouraged to spend them, tout 'suite, or watch them dwindle to irrelevance. It's an aggressive recognition of how the utility of currency is exchange. And it lets you foment adoption by spraying a firehose of money and not really worrying where it ends up.

If you wanna have money just to sit there and look at it, buy shiny rocks.