Agree. No other cryptocurrency has been able to outpace Bitcoin. Not even Ethereum, which is the world's second largest cryptocurrency by market cap. Considering that Facebook's Libra cryptocurrency will be extremely centralized, it won't stand a chance against existing decentralized solutions. The beauty of Bitcoin relies on its decentralized design where no central authority is in charge of its future direction. Also, supply is deflationary and only governed by the protocol itself. Unlike Libra, Bitcoin allows anyone to transact freely without the intervention of a middleman or third party.
I believe that FB's Libra cryptocurrency will become extremely monitored by governments worldwide and Facebook itself. This would greatly threaten the privacy of many people, as their transactions will be exposed to centralized entities. In effect, transactions can be restricted on the network, accounts can be frozen, etc. On the other hand, this is not widely possible on Bitcoin. Of course, if Libra becomes a success, then it would become widely adopted by the mainstream world. This would prove to become beneficial towards Blockchain technology itself, but not for Bitcoin.
Despite this, we cannot predict the future. Libra has just been announced, but it's awaiting launch within 2020. It may take some time before we could determine what would be of this new cryptocurrency within the mainstream world. As some of Libra specs have not been revealed yet, we cannot know for sure whenever it'll be deflationary or otherwise.
Nonetheless, Bitcoin and other cryptocurrencies will still be in the lead for many years to come. With already existent stablecoins like USDT, USDC, and more, Libra may have a fierce competition to keep up with once it's launched within the mainstream world. Just my thoughts