In my opinion, it is very unlikely that the Facebook company will adopt bitcoin, didn't they previously say that bitcoin is not good for investment because there is no guarantor for the asset, so they make their own stablecoin called libra and which can guarantee our assets like conventional currencies in general , but so far there has been no sign of launch.
It would be absurd to believe the word of a large corporation like Facebook, their vague policies and statements are always plans to distract competitors, they don't care about bitcoin but they have implemented the libra project in the past and this project wants to be successful, it forces a link to bitcoin. The actual theory and action are inconsistent, most likely they are coming up with another plan into bitcoin as soon as they see bitcoin has grown too much.