Crypto noobs simply can't put it in their heads that Bitcoin rises because of speculation, they always try to find some "logical" reason behind the growth, because to them speculation sounds too simple, inelegant and probably most of all - scary. Scary, because to acknowledge speculation would in their minds mean that nocoiners are right when they call Bitcoin a "gambling device" with no intrinsic value. But they are wrong, because speculation is just price discovery on a free market, there's nothing bad about it.

Libra is just the latest on the list of noob's reasons for Bitcoin growth, usually it's economic problems in some countries or on stock markets, political instabilities and so on.