Plus, what was he thinking? He stole electricity and mined bitcoin? Out of all the efficient cryptos, he chose bitcoin, wow. Bitcoin mining is useless unless you have a big mining farm.
I think he had ~800TH of hashing power, 50 ASICs, I think you could call this a farm.
He mined 3.2
BTC in 4 months, I would say it's good money when you have free electricity.