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I believe, are converting their coins into their own currency, to pay their electric bills and for new equipment.
And as such, they are concerned with current btc prices versus their expenses.
I do not think the miners are thinking along your lines yet. But will one day in the future.
I don't think miners are thinking like that right now either, but they can't just be all about profit They've got to show some effort and dedication to the cause... If we have miners focused on quick profit only, and if those miners happen to have a lot of power in the blockchain... I don't even want to think what could they do. From selectively mining transactions to being able to control double spends... it wouldn't be good.
I know they have to pay for electricity, and they can sell whatever coins they need. But we can't also make them feel dependent on our fees... Our fees are just a little help, and incentive, a way of saying thanks. We hope that one day the fee market will be very competitive due to high acceptance of Bitcoin, so there will probably be enough fees to pay miners by then.