Built-in demurrage has been tried with Freicoin, which has been around [0] since 2013: http://freico.in http://freico.in https://coinmarketcap.com/currencies/

Built-in demurrage has been tried with Freicoin, which has been around [0] since 2013: http://freico.in http://freico.in https://coinmarketcap.com/currencies/freicoin/markets/ https://coinmarketcap.com/currencies/freicoin/markets/ [0] For the loosest definition of "been around" -- I assume its blockchain still exists somewhere, but their own website links to an explorer that apparently doesn't exist. And their Github repo hasn't been updated for ~18 months: https://github.com/freicoin/freicoin/commits/master https://github.com/freicoin/freicoin/commits/master