We’ve got bitcoin, dogecoin, litecoin. Every day a new coin. These are known as cryptocurrencies, unregulated digital coins that live outside the banking system in blockchain technology. Recently, the U.S. Federal Reserve said it was exploring the possibility of a central bank digital currency, or CBDC. It would be issued, regulated and backed by the government, just like paper dollars. Some countries are already experimenting with this, like the Bahamas, Nigeria, Sweden and China. Marketplace’s Meghan McCarty Carino speaks with Eswar Prasad, professor at Cornell University. He’s the author of a recent piece in MIT Technology Review: “Money is about to enter a new era of competition.” And he explains what it would look like for all these currencies to coexist.