You are right. Greedy is a big problem in crypto investment or trading, which makes people get big losses. If we have bad self-control and just follow emotions, we can easily be influenced by greed. Only people who have good self-control and think realistically can avoid the greedy. Well, greedy is a disaster if we can not control it, or follow the greed leads to riskier ways in investment/trading. So, we really need to learn how to deal with greed.