Greed seems bad in everyone's view but you can't deny that thanks to greed, people are more likely to hold and push the price higher. You've to understand now all greed is bad since crypto has some form of greed in itself, attract investors thank to the 'get rich quick' scheme and exposing it to the mass public and social media.
No body is against you buying and holding as the case may be but what do you do once the market is favourable to you will you also time goes on. Do you keep investing instead of selling then making your profit? You can make it but have the mind of maximizing profit.
If you are modestly hoping to make a profit then you have the potential to lose here.You should bet with a specific idea.You should have in mind how much profit you will not citysell. And if those who invest for long term then you have to wait for a long time and sell them when you see profit.