Why people will waste their money? they can easily pay with crypto to facebook or can use the paypal or bank to pay to facebook while if they purchase libra, they have to first pay for btc+exchange fee then they will get the services. Even paying with fiat will be cheap
If Facebook launches LIBRA then nobody will invest in it
Stable coins are created just to earn more bitcoins, Facebooks' aim is to launch a stable coin but I think people won't take any interest to invest in a stable coin because it will only offer benefits to facebook to earn more bitcoins, while the community and investors will have no benefits. I don't think that anyone will ever be interested to invest a penny in it.
All my other predictions come true (you may check bitcoin forum) but still there is no whale who ever donated a penny.
It's on your own opinion to think that people won't venture in, trust me crypto is tricky before you knew it the bigger boys will get in and hype the project and as well make out money so you never can tell.