To have a digital asset , a cryptocurrency that too backed up by major companies so that we can entrust it actually with some money and it won't go too low as we expect it be .
Therefore I don't know why this is not something that is a good thing .
People aren't very fond of it because they don't trust Facebook's ethics, and they see this as an attack to privacy. People are coming up with worst case scenarios, but most of these won't even come close to being realized if Libra doesn't achieve worldwide success -- something which I don't see happening, considering its limited use cases.