I heard people saying it won't affect bitcoin at all, and others say it might destroy it
I wonder what's your opinion about it?
What can be the worst case when it comes to Libra and Bitcoin?
Libra is included in Altcoins. So, I don't think Libra will influence Bitcoin too much. We know that Libra will come with a good utility. But again, that is not a threat to Bitcoin.
Yes, already it is an altcoin. This will make influence around as a everywhere usable asset as Facebook has got its network being established all over the world. Apart from this it is a Stablecoin, and this too isn't a threat to the bitcoin. Most of the users who prefer bitcoin were to experience good earning out of its volatility.