Gold-backed currency and its potential uses. (0:00)

- Gold-backed currency and its authenticity. (2:39)

- Gold recovery from melted gold backs. (7:31)

- Melting down gold backs and verifying their authenticity. (13:32)

- Gold purity and testing methods. (16:50)

- Gold backs and their value compared to raw gold. (20:45)

- Testing gold purity using acid tests and other methods. (27:17)

- Gold value and its potential to hold value in a post-cash society. (30:41)

- Gold backs and their acceptance rate at farmers markets. (34:24)

- Using gold backs as a form of currency. (39:51)

- Gold backed currency with scientific testing results. (47:15)