Suggest not to mining, if you have low power channels, you can try. The current market price, or a little profit. But within a short time bitcoin price changes too much, if the purchase of many mills to mining, met price drop too much, then it is easy to loss, we must pay attention to risk control.
It's still not too late to do mining, but Bitcoin's level of difficulty is very high, Bitcoin Gold is suitable for mining. Ripple is also preferred for miners.