This week on #BlockchainCentral You may have heard of Facebook's new project codenamed "Libra", the social media giant's new #cryptocurrency, set to bring in billions of dollars revenue every year. The project is planned to be a #stablecoin, but what exactly IS a stablecoin? br br Today, we unpack the new "holy grail" of cryptocurrencies, including taking a look at other projects such as Tether, Petro, Gemini's new stablecoin, Paxos and TrueUSD.