I am starting trading some month ago.Bought some alta coin but now all alta coin are down and i donot understad what can i do?I get a big lose if i sell this.So how control my mind ?

Emotional control in trade is one of the most important things, if you do not master your emotions, things can get worse. As for your problem, I think you should calm down to look at the situation, should not panic. To control emotions is not easy, but I have some tips for you. You should eliminate the feeling of losing your chance if you do not enter a certain order, there are still other opportunities waiting for you. Do not pay too much attention to profits or losses in the trade, it can affect your mind. Gradually remove the negative thoughts, be optimistic and confident in your ability. Hope this can help you

Panic is the natural thing and this can be eliminated as the experience come and I have seen a lot of people who are very worried about their panicking and now they got enough experience in crypto field and this give them ease to earn a lot and also now they are well aware of market critics that when price drops people will start buying and this will a pump to prices and thats a true thing so dont get panic.