The promise was that no single entity would want to control it since nobody else would want Bitcoin if they did.
Which won't stop someone from trying to ride that line if that promise carries any connection with reality. Or the promise is just naive and once people are invested in using it they'll refuse to give up the value and will tolerate single entity control.
That's a dumb promise, since all it takes is one third party with the desire and means to control multiple entities for non financial reasons; for example, a state actor with treaties and regulations.
They would not be able to capture it unless they get consensus.
This electricity is used to verify transactions. I dont know how much electricity is used at Visa or the federal reserve to print money.