I understand it depends on electricity cost and other "future value" thinking but at what price point of ETH, people plan to stop rig?
No, no, no, i dont agree with anyone saying that there is such a limit. Sure, electricity costs, PUE, blaah. But! Look at the oscillation diagrams, look at the history, look at the volatility of fiat currencies. Do you run to the bank to take off your fiat currency from your savings accounts as soon as the exchange rates go down?? One day they are down, they next day they are up. Whats next, when you switch off your rig??
And... there are other altcoins that keep growing.