Based on my experience, the things that influence me in making my decision are my emotions and Technical knowledge. It is something to note that the more we become too emotional, the more we can't think the right thing and it leads to making wrong decisions. It is very common when we are newbies but as we gain experience, it gradually changes and now we are focused on following the trend, doing TA, and improving our skills and strategies. Because when we are a newbie, we feel worried that is why we become too emotional.
Emotions and the news are the top contributor on making decisions and in trading even if you practice not to get very emotional while trading you can’t still escape the fact that you’re still affected especially if greed is taking over your trading decisions. News are common as well, as a trader you should only not focus about the price trend, but also see the market trend because in crypto, the market can easily go pump and dump on every news.
Every time we trade, regardless of how hard we try, there is an involved emotion since we put money into it. Whatever occurs, we must trade in accordance with our strategy. However, due to previous losses, we can become emotional, which complicates our trading. This is a hurdle to our trading strategy, and if we are not conscious, we will become victims of our own emotions. As you stated, greed is a result of emotion, most notably consistent losses. To be good traders, we must understand how to manage our emotions.