i don't think this is a greedy behavior because some of people want to hold it until another folk coming
and some people is a true fans in bitcoin ,
What? greedy?

Think about yourself. Choose a strategy and stick with it.
Holding bitcoin, I consider to be smartness rather than from greediness. Since it is the best way to make out a huge amount of profit as the currency is quite volatile and its potential to grow up to enormous heights enable investors to get there desired profit...