Well, from what I can remember, being in the relative beginnings of bitcoin, it was never too profitable to mine an alt-coin. You always would be just above cost of electricity and sometimes below it. Even if you make some of it most of the time is not worth it. The whole market is formed right at the premise of cost-price, so it would be pretty unfair if you could pay 5$ for electricity and make 100$. The catch is that you can mine a coin pretty early on and it's price can go up in the future. Think of it like an investment. If your goal is fast cash though, you can never be sure in that "business" that the electricity you used and the hard work you put your machine through will pay off. Imagine you mine for 24H and your equipment is destroyed, you already are -300 $ in cost. In my opinion crypto-coins are either a long-time invesments, or an experiment as a hobby.