About 70 millions of people owning Bitcoin. I can´t even imagine how many people could use Facebook coin when starts.
So it would be pretty easy to overpower Bitcoin.
I think all projects after Bitcoin have a big ambition to defeat Bitcoin but in reality nothing has gone beyond Bitcoin, Even though Facebook has a very large user, I'm sure most of them don't use Facebook coins.
If we take into account that the majority of users on Facebook uses this resource only as a social network, then I very much doubt that all Facebook users will want to use this resource as a payment system. Of course, quite a lot of people use Facebook for their business purposes, but this number is still not the majority.
totally agree with you. there is no need actually for libra. the people without bank account wont be able to get libra. the next thing is i see no sense to use libra for me. first of all i have no facebook anymore for some years now. second is, when i buy something i can still use paypal.