Which of the following is true about Central Bank Digital Currencies (CBDCs)? Central Bank Digital Currencies are always built on the Ethereum network. Central Bank Digital Currencies are always centralized and never exist on another blockchain network. Central Bank Digital Currencies are not being developed to any real degree outside of a few small countries. There are several competing approaches to Central Bank Digital Currencies including centralizations, decentralization, and building CBDCs on another blockchain. QUESTION 3 Stable coins serve a unique role in the marketplace for cryptocurrencies because They are backed by central banks. They are similar to demand deposits from an exchange. They increase the volatility of holdings compared to holding Bitcoin or other cryptocurrencies. They have no risk since you are always guaranteed to get US dollars from stable coins.