The head of Calibra, David Marcus told the Senate Banking Committee that, Facebook will only build its own Calibra cryptocurrency wallet into Messenger and WhatsApp, and will refuse to embed competing wallets.
what's your take on facebook libra hearing?
So they are on their own and will not support any coins or promote other cryptocurrencies into their products and services, well because of that other Cryptocurrency should do the same, I will not be surprised if they are going to launch their own exchange, and compete with Binance and other top exchange in the market.