we should call it a centralized online payment processor.
Yes, we should do it. Facebook is not a crypto coin, they will use the Blockchain Network, that's it! Facebook's Libra coin will be used as a payment procedure in Facebook's native apps! Though we don't have any official source for it, but I assume this will be the truth about the Libra coin!
by the way, it has nothing to do with price and bitcoin is not an investment, if it were then its price would have tanked hard a long time ago just like how altcoins get dumped and never recover again since altcoins are purely for investment and have no other usages.
Every altcoin aren't for just investment, some altcoin has a very good technology and plan! They are working hard for the crypto mass adoption, we should appreciate that!