It could even make it to the top considering how huge Facebook as a company, partners of Libra and how huge the users are in Facebook. It will be easy to shill Libra in its own platform and considering as well the daily input of FB users worldwide it will never take months or weeks before a million potential investors will try to own a Libra. It may be a stablecoin but it's potential use case and not just the value of its own token that matters at all, it could be used to pay those who runs an stream something like that, FB gaming is lit nowadays.