Thanks a lot for your answers fellows. To answer the first 2 replies I agree with your logic, but what happens when you don't have the funds to buy the coins you want to, but instead you have some equipment that can get you some?
And I mean to mine with a small profit (small but profit).
In this case is ethereum the best option? I believe that yes, instead of looking for anything else. Maybe there are other coins too that can do the job. I don't know.