Demurrage[1] money acts in a similar manner to encourage usage of a currency. Freicoin[2] implemented a demurrage fee mechanism of 5% per year, which would have

Demurrage[1] money acts in a similar manner to encourage usage of a currency. Freicoin[2] implemented a demurrage fee mechanism of 5% per year, which would have the effect of eventually clearing out burned "dead" tokens, although the transaction history would still need to be stored until the end of time if you ran a full node that long. [1] https://en.wikipedia.org/wiki/Demurrage_(currency) https://en.wikipedia.org/wiki/Demurrage_(currency) [2] http://freico.in/about/ http://freico.in/about/