Can somebody share with all of us, at what price level does BTC becomes unprofitable for the miners and they start shutting off they rigs and BTC collapses completely? Is this even possible?
At current difficulty, on 20 nm process and 10 cents per kWh, I'd guess around 200, maybe a little less...
with free electricity around 0.1 dollars i guess
This is true. Assuming no capital equipment cost.
Unfortunately 99.999% of miners dont have free electricity.