“I haven’t paid for heat for three years,” Fakhoury says. “I would suggest people put half of their bitcoin investment into mining and half into purchasing the coins. That way you hedge yourself in both directions.” In 2015, when he first started mining, he initially spent $1,200 on machines. He says it wasn’t profitable yet for him since the price of bitcoin was only around $300. As the price has risen, so have his proceeds. Besides bitcoins, he now also runs graphics cards to mine ether, the token of the Ethereum network, which runs on its own blockchain. Ether is another red-hot cryptocurrency — its value is up more than 5,000% this year.

https://finance.yahoo.com/news/bitcoin-miner-havent-paid-heat-three-years-143714695.html