@Paultier Github is only displaying the source code. Github could delete it and the Bitcoin blockchain would still run. As far as I understand, correct me anyone if I’m wrong here, but anyone can take the source code and make their own blockchain from it. All that would happen is another blockchain with another cryptocurrency would be published. Ever heard of an Ethereum based crypto? That’s cause they used Ethereum’s source code to start their project. The same concept is true for Bitcoin.
It takes community consensus to alter the source code of a blockchain. That is why forks happen; not everyone agrees on the change that is proposed. This is where Bitcoin Cash came from (if I remember correctly), it was a fork off of Bitcoin. Not everyone agreed to the change being made to the code, so it split into the two.
Hope this clarifies some things for you