I can't see a y justifiable reason why facebook coin will rival bitcoin the grandfather of all cryptocurrency, i think people are over thinking it because facebook is a popular social media platform, it doesn't mean it will rival bitcoin
their community may be already big and their platform is popular, but that is no reason to rival bitcoin. whether Facebook will work like what with their crypto. because social media platforms like steemit and medium already exist. but Facebook is more on the conversation platform, it might move a little differently than other social media platforms.