Libra is a simple global currency and financial infrastructure that empowers billions of people.
Libra is the newest weapon in the arsenal of the infamous data vampires called Facebook.
They will take every last drop of personal information they can get from you, and they will bleed it dry. "Your" data will become their data free of charge. They will construct a digital model of you to sell on to advertisers. They will curate your newsfeed based on the model of your personality, in order to subvert your free-will and direct you towards FB's desired behaviours.
Other than that, great coin.