the Sand Dollar is the perfect symbol of currency and monetary policy. Nature based resource management.
Even the Central Bank of Bahamas Launched a "Sand Dollar" which reminds me of the Marshal Islands https://sov.foundation
https://theworldnews.net/bs-news/benefits-of-sand-dollar-digital-currency-highlighted
San Diego SIlver and Gold Coins :) We have an actual half dollar that is real legal tender , maybe we can issue tokens as NFTs to match with actual tokens, well, they dont have serial numbers but Bills do! We could allow people with specific bills to win special crypto games. Anyway i would rather just work on REAL SAND Backed DOllar system like Steem has SBDs