Some people can afford to mine at a loss, and that makes it a profitable business
Uh, what? It's not "at a loss" if is is "a profitable business", you have to pick one.
I mine for hobby, I mine at a loss, I want to see the difficulty go down down down!
I think he means at the time it is at a loss because the coins mined would equal less than the electricity bill.
But he also means it is profitable if the BTC price jumps up, like january to march lows of $180 to highs of almost $300