Will Libra Coin bring Down Bitcoin's dominance in the market, your thought?
There is a lot of thing Libra need to accomplished first before taking up after Bitcoin. It hasn't been deployed though, and I do not think it would all go through. Besides there are some articles that are suggesting Facebook should drop Libra and take rather take up the square. In addition, a lot of alts are already did the same thing but none of them stood up.
especially the legality of the government and also the problems of the pros and cons of the common people. this may be one of the difficult problems that must be resolved even though there are many large partners who support this Libra project. but I heard bad news that big partners canceled agreements with Libra Projects like Visa, Paypal and maybe there's more.