In my opinion, Facebook coin, Libra (official name), might become another big scam coin, like Bitcoin Cash. It might be a big scam coin, in aspect of anonymous for their users. Facebook, years after its birthday, has never been a private platform, and their users' identities leaked from time to time. With Libra's whitepaper, and based on core developmental strategies of Facebook itself, I don't think Libra coin will bring any sort of privacy and anonymity for their users. Even when Libra used to pay for likes or other kinds of things on Facebook platform, users will have to do bunches of KYCs in order to withdraw their money (I believe).