Have been researching QC's and bitcoin for months. It is not clear from many sources of the World Wide Web whether or not QC is a threat to the sha256 of Bitcoin.
1.Can we if possible mine more than the specified value of BTC in less than a minute with the help of a powerfully-eligible Quantum Computer?

Agree that QC's can destroy Elliptic Curve Digital Signature Algorithm and steal our private keys. So considering all of the above threats,

2.Is it possible to fork Bitcoin and solve the following problems?

3.How to secure the SHA256 encryption and make it immutable to QC attacks?

I am pretty sure, Satoshi Nakamoto must have thought about the possible problems there has to be a solution, but exactly where?