I certainly can afford to run an s-7 at freq 200 which is about 1600gh and costs 400 watts a day
That is 10 kwatts a day or 300 kwatts a month at ten cents 30 bucks a month.
I can spend that for the next 30 years easy. So if I can do that others will to. So like I said the if the op is asking is not going to happen.
Other tricks can happen but zero hash rate not likely
I kinda feel it's the same territory as 51 percent attack here. We can think of many things that would straight out kill BTC.... but they will never happen. No BTC pool making big money would do 51 percent attack and kill future profits. Just like there will always be miners.
And you have a good point if bitcoin tanks there will always be some (including myself) who will have a machine running out of pure joy. I want to make ROI. But if BTC failed.... I think a surprising number would still mine a small amount. I also think crypto currency will be here long after today, I think BTC looks like good bet long term. But if it failed it would there would be another to pop up. But again BTC is like the gold standard.... so would take huge jump for it to fall.