BUT
You need to be greedy at crucial points
For instance, be greedy to buy several coins dumped and Hodl for your profit
Be greedy to buy the news and sell the rumours
Do not encourage others, most especially newbies to be greedy in whatever they do. It is the law of nature. Greed has it repercussions. If care is not taken, with greed, you can loose all your investments. I have a typical example of such.
A friend of mine invested into crypto and was caught by fomo. He saw the coin increasing in price and he thought it would continue. I advised him to sell, but he refused and said it might increase more. Just in few hours time, it started plunging. Instead of selling, again he said, it might rise back. It is quite painful today that he lost what he invested into the coin, because it was later abandoned by the developer and it became so useless.