Stefan Ingves, former head of the Sveriges Riksbank, Rebecca Spang, a history professor at Indiana University, and economist Iñaki Aldasoro delve into the elusive definition of currency. They discuss the evolution from physical forms to digital money, highlighting how technology reshapes monetary systems. Trust becomes a key theme as they explore currency's role during financial crises and the impact of design on national identity. They also consider the implications of public versus private currencies, offering a rich perspective on what truly underpins value in our economies.