3. Will BlackRock and the central bankers be able to fork BTC into a proof of stake coin? ( How are changes to BTC created ?)
Thanks,
Ron
I will skip the first two questions as you have already received many great replies. I will focus on the last one.
Anyone can fork and create their version of bitcoin. We already have hundreds of such forked coins dying in the market. But if you want to make changes in the real bitcoin itself, you need to reach a consensus from the mining community. At least 95% miners need to support that change. There is a great article you can read to learn more about BIP.
https://galea.medium.com/bitcoin-development-who-can-change-the-core-protocol-478b8ac5fe43Hope this helps!