The coins might succeed due to popularity of facebook. Nothing else. Libra is going to be a centralized currency. Why would we need another centralized currency system, when we already have paypal and other e-wallet currency? If we will have to provide our details and identification then what is the difference between this system and paypal? The main goal of crypto currency was to create a decentralized platform which will give us financial freedom. We won't be getting any of those features through facebook coin.