While trading we have to follow few rules and without following those rules there is no way to be a successful one except a successful by chance. There are lots of rules of them greedy plays a vital role. While trading never be greedy. If you become greedy while trading then you can be assured that there is 90% possibility to be a lessor.
Yes, In trading greed can destroy yourself fully. you have to make a good plan and then you have to follow the trend of the market. don't want too much at a time, you have to be patient if you want to make a good amount of profit.