Facebook is indeed a platform with the most users in the world. Facebook is on Alexa's top 7 list. I think Facebook is beating coins that are already popular today. Libra is a subsidiary of Facebook, under the name of the company Cilibra, and the blockchain name is the Libra.
But I think Bitcoin remains the mainstay of Crypto users. The concept of Bitcoin has been tested in recent years, while Libra is a newcomer. In terms of security and position Blockchain has not been tested.
I think this condition is endangering coins with more minimum user standards, exs Tron.