The article discusses the rise of digital currencies like Bitcoin and Alipay, and the potential benefits they offer for consumers and businesses. While private digital currencies can be convenient, they also come with risks like price volatility. Stable coins backed by safe collateral aim to address this issue. Central Bank Digital Currencies (CBDC) could provide a solution by combining the convenience of private digital money with state support. However, the deployment of new payment technologies needs to be carefully managed to avoid disrupting the financial system.