If Bitcoin reaches 100k tomorrow, there will be 180 million to be earned, miners would be happy to spend 150 million a day on energy to get that.
At a price of 5 cents per kwh....you're not going to like the result

A large part of the expenses incurred by the miners can be attributed to the capital costs. Setting up a mining farm can be very expensive, with all those mining rigs and air conditioners. Right now, there are only a few manufacturers that produce the mining rigs. And they don't have the spare capacity to increase the production 100x.