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.
Being is just fine as long as the market prices are dropping because in this way you can purchase cheaper coins in order to earn more profit when the market prices goes back to normal.