Deciding to take iit jam coaching can vary for everyone and a lot of it depends on your educational background. If you are already studying from a top institute like IIT, NIT, then you have a good environment of studies and all you need is to focus on self- preparation. But if you are from a normal or lower institute, then you need to opt for coachings as they will guide you right and provide ample information to you.

But also it can be said that it is not at all necessary to take coaching for everyone because if you decide to prepare firmly for something, nothing can stop you from achieving that. So it depends how dedicated you are.