Ever heard of modern-day bartering that some call 'mutual credit'? It has become well developed and established already. Just not that well-followed. It will come into its own when SHTF. It's hyper-inflation proof. Here is a good list of links: https://systemschangealliance.org/mutual-credit-an-introduction/ https://opencredit.network/2019/06/15/mutual-credit-accounting-and-tax/ https://www.irta.com/2015/09/the-sardex-factor/ https://www.irta.com/about/the-barter-and-trade-industry/ https://www.natebarter.com/ https://www.arizonatradeexchange.com/default.aspx Holo has been interested in seeing this developed as an hApp in their Holochain system. The timing could be a little better but is another sign of the times.