Why use USDC over USD?

Could you please explain to me the advantages of using USDC instead of traditional USD? I'm trying to understand the rationale behind the increasing popularity of cryptocurrencies like USDC in the finance world. Could you elaborate on the functionalities and benefits it offers that might outweigh the use of traditional fiat currency? I'm particularly interested in its stability, ease of use, and potential for cross-border transactions. Could you also discuss any potential risks or challenges associated with using USDC? Thank you for your insights.