The difficulty will increase, but the price may increase. I remember a year or two ago I was calculating all my BTC mining efforts on its value being under $30

The difficulty will increase, but the price may increase. I remember a year or two ago I was calculating all my BTC mining efforts on its value being under $30. Some efforts were break-even at sub-$30 exchange rates, but now in retrospect were well worth it. But the big term is may, as it also may decrease.