I think you misunderstand and have too much respect for centralized power system.
Actually in order to do this you need to basically do a 51% attack against BTC. CZ called it somethig kinder more like a fork with consensus. He called for another BCH style approach to a disagreement.

The process is clearly outlined in the BTC whitepaper as a vulnerability with decentralized currencies. Get 51% of miners to agree, especially by offering to pay them well, and anything is possible.

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