Mining profitable coins comes at a higher cost now compared to some years ago as more and more people enter the foray to get a piece of the pie. whether he was in it for himself or for clients he certainly made some profits for himself. However, we must not forget that the cost to mine a block or a coin is actually increasing and then to see the markets fall helplessly, the profits are all burnt and it may not be exactly profitable at the moment to mine until the market recovers.