For creative individuals, their ideas were usually a hit or a miss. In Zerg's case, he had Rino to rely on to always make them a hit.
Ubel created several tiny bar moulds that Rino found too good to dispose of after their uses. He could think of ways to make these mini bars work. Currently, nobody used money for anything even when the population is booming. Rino only thought about making something reliable as a valuable currency to reward his workers with that could be exchanged for other benefits such as an entry fee for the hot spring baths or even collectable items. Rino only feared that the moment these coins were made, they would be spent on limited but highly sought after items such as taro beer. The economy would crash before it began, and Rino didn't want that.