The threat is just the privacy issue for the fact that facebook has done it before. For someone with a ton of money in crypto would be threatened to come to the platform because browsers are used to collect data. Libra can help the crypto market, this is true amazing for crypto users. With the billions of users, this price spikes today I think is because the announcement of facebook.
That's certainly true, mate. For this very reason, some people are afraid that Facebook's Libra cryptocurrency will turn into a "Honeypot" for the government. Transactions would be easily viewable across the digital ledger controlled by Facebook itself. Whenever such transactions meet the requirements of the government (and Facebook itself), they will become accepted in the ledger. Otherwise, your account could be easily frozen or detained by centralized entities. Which means, no one is safe even if you have nothing to hide.
In contrast, popular cryptocurrencies like Bitcoin and Ethereum are free and open to anyone worldwide. There's no middleman or central authority keeping track of your transactions across the Blockchain, giving them control over which transactions are accepted and which are rejected. Of course, Bitcoin and Ethereum are still transparent by design. But, having no single entity in charge is a plus as it prevents transactions from being rejected or seized by third-parties.
What really matters here is censorship-resistance and decentralization. Most people don't seem to care about this, since they're only into crypto for the money. But once they realize that Libra is just another banking system, they'll truly grasp the benefits of alternative blockchains we know and love today. Personally, I see Libra as a main trigger for the adoption of crypto and Blockchain technology worldwide. It could bring lots of investors into it, allowing prices to skyrocket within a short time frame. This makes a great opportunity to earn profit from Libra during its early days. But, I wouldn't recommend using it as a serious cryptocurrency because of the reasons mentioned earlier.
Nonetheless, if Libra's launch becomes a success, then Blockchain would've finally become adopted by the mainstream world. However, considering that most governments and central banks have been against Libra, it's very unlikely that it'll be able to survive anytime soon. Just my thoughts