Limit is on where something you should be mindful from time to time not only limited to investment but also in other common decisions in life to be taken because when you do have this kind of behavior then you wouldnt really get easily wrecked whenever such unfortunate events would happen.Also when it comes to investment decisions then you shouldnt really have that kind of behavior on listening to others because its your money on the first place which means that you are the only ones who could make out full decisions towards your funds. Risk only on the amount that you could afford to lose.