As a trader who knows the movements and struggles in crypto currencies it is impossible to have a greedy attitude. But the greedy nature has become the nature of man, where when all of his needs are fulfilled, he is still seeking other satisfaction. That's human nature. We should be wiser in playing in crypto currencies. Greed will only lead to loss. If we are greedy there will be no one to help us when we fall. We should always be humble and always grateful for all achievements, especially in crypto currencies.