I think facebook coin has a great future ahead as their community is quite large and even if few percentage adopt the coin it'll be a big success and there are possibilities for new centralized coins from other big players soon after FB coin success.
Coin Facebook finally appeared and was given the name Libra, predicted to explode in the crypto market because members owned by Facebook were around 2 billion. Of course this is a separate market that has great potential if it can be optimized. Especially for trade transactions in the Facebook community.
While outside the community, Facebook can use Libra coins as short-term or long-term investments and trades because transactions can occur through crypto exchanges throughout the world.