With the price plummeting I am wondering at what price will Bitcoin not be profitable to mine anymore? What is the break-even point?
What happens when the price is so low that it costs the miners more to mine BTC than it rewards them? What happens if they pull the plug? BTC is dead then?
Well no, the bitcoin mining is always going to be profitable no matter what the price is , the block mining time and the difficulty are always chaning in order to adapt to the number of miners that are mining bitcoin, so if the bitcoin price goes down so is the mining time so means it will cost less to mine bitcoin, so as long as there is electricity and pople trying to mine even with their GPU's there will always be profit from bitcoin mining.
Well, this is true. Mining will be profitable even the price is too low, I don't think that mining will stop at any point in the future as long as there is electricity. This is right that the difficulty of bitcoin mining increase which you can't make a good profit unless you buy a good hardware, Like Antminer S9 or maybe with GPU's. I know some friends use GPU's and they made already a good profit each day even with this difficulty.