If we hypothetically agree to all of these scenarios, do you think a government like that of the US or the CCP will mine BTC openly, even when they've 'openly' not supported either BTC or BTC mining all these years, or they are going mine secretly, another thing is, can we be sure some of these top government officials do not anonymously/secretly own BTC mining farms, they know what's good right

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Government officials can own their own businesses, and those businesses could include crypto-related companies. I don't think it will ever become an industry officially supported by the US or China. They can always have a hand in it through their influential corporate friends and business associates.
The problem then becomes one of accountability and sustainability, especially when energy sources like coal and oil are being subsidized by government entities who claim their environmental responsibility is not strong enough to lead the way into technologies like alternative energy or energy efficiency directives and standards.
The sun is free, they can't charge you for it. So is the wind and the power that comes from those sources. Big corporations don't profit from free. That's why Tesla (the man, not the car company) wasn't needed after a certain point.
Not to mention that in China a large proportion was using excess energy from hydropower which was otherwise being wasted during periods of low demand.
And yet, they banned it. High energy consumption is never the reason. It's just the explanation that's presented to the public, among other things.