With all cryptocurrency, greed is the die. I think with most newbies, the first lesson you should learn is not about knowledge, it is an emotion controller lesson. It will help you very much when you work.
Holding bitcoin is greedy but the reason you invest in bitcoin is because you want to make money so i think that being greedy is necessary to make money with bitcoin. So you should hold your bitcoins to make yourself some money and don't care what others say.