50% of the wanna be "traders" don't know how to calculate volatility and simple probability. The 50% who do know, 50% of them either don't have any risk management or have any discipline, 30% of them are not emotionally stable. so if you don't have such problem, that puts you in the top of 10%. so your chance of making it is not really 5%, but 50%. all you have to do it to develop some edge and practice it.