Its a very common phenomenon that when the market rise then many of us get overconfident that it will rise further they get greedy. The reality is that we can't predict the market completely however based on the technical analysis we can have a better understanding.

Yeah no one can have 100% accurate predictions all the time,overconfidence kills the investment of many traders,the overconfidence makes them to take personal decisions on the market without even verifying if the decision is right or not..