As you know Facebook announced their own cryptocurrency LIBRA but various legislation needs to complete before launched, so after launch can buy but this will be stable coin and will not affect BTC price.
There is no indication it will be a stablecoin. It will be on exchanges and will not be pegged to any fiat money like dollars, so it will move like all the othe other alts and be volatile. It will behave in the same way as the alts based on market conditions with same price movements.
Oh really where does that info come from.
The only difference with Libra is that its price is made up of several fiats plus digital assets (USD + Euro + other fiat + digital assets) = Libra, if the algo to form that stablecoin is public or not no one knows right now. One thing it definitive will not be, is deflationary and will lose value over time. A new car used to be about 800 dollars.
Every private company establishing some money has been taken down because it is in direct competition to another private company the federal reserve bank.
Facebook Cryptocurrency = Inflationary, losing ~3% of value per year
BitCoin supply halving every 4 years (less and less new coins available)