I wrote an article about what I think of Facebook Coin.

Would love to have comments and feedbacks:

https://medium.com/blockchain-positive/how-facebook-coin-can-help-billions-of-people-by-not-being-a-stablecoin-d780b6579e93?source=friends_link&sk=9580e46c3d6923836a17e91c0855a6d5