I would like to play devil's advocate
From this article I read
Unlike the volatility seen around other cryptocurrencys in the past, we believe that Libras focus on creating a stable, low inflation currency backed by a reserve or real assets is a differentiator. Further, unlike other stablecoins, Libra will not be pegged to one currency but instead a basket of assets ranging from bank deposits to short-term government securities.
https://www.cnbc.com/2019/06/18/the-difference-between-bitcoin-and-facebooks-libra.htmlWill Libra Coin bring Down Bitcoin's dominance in the market, your thought?
This is just like asking if "a cat can put down a lion". Libra can not and never near Bitcoin's dominance, adoption and acceptance. Bitcoin remains the #1 cryptocurrency. So please let's stop the comparisons between Bitcoin and Libra. You may compare Libra with some sort of alts but not with bitcoin.