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 Coin is a stable coin backed by fiat money. This will make fiat money circulation increase and possibly will make the price of bitcoin rise. Bitcoin and Libra Coin users are different so in my opinion Libra Coin has no effect on bitcoin because bitcoin is now starting to be used as a store of value and not as a peer to peer payment tool