be patient and don't greedy to expecting a big profit unless you are sure that the price will increase higher in short time. because sometimes we make a mistake and we hope that our profit will come bigger if we are not selling at the high price at the moment. but after the high price is reached, the price is only getting down and even its down too deep. I have this experience in the past and I don't want to get the same experience anymore so when the price is getting high at least two times from before, I will start selling some parts to take my money first and then I will wait for another time to sell at the higher price.