Not your first topic about quantum which shows you either don't read through or just spamming.
In your opinion, how do quantum computers actually work❓
I believe this is something a simple Google Search could solve.
and how can they be used in Bitcoin or what impact can they have on Bitcoin and why❓
It doesn't affect SHA 256 but makes it theoretically possible to get private keys from its pubkey.
It seems like quantum computers were made just to destroy Bitcoin.
Well it wasn't
Technology development continues to grow and there are lots of great things especially in medicine that it can help with.