Greed is a natural part of human being, we can only manage to control it, and in controling greed, some are very good while some people really suck at it.
So, in a community where people bought a coin at a cheap rate, know it that not very many people had or have plenty of money to buy that coin in the quantity that they really want, so, for those who bought very small quantity, it is absolutely a normal thing for them to expect the price of that coin to go very high in near future, or when ever that coin gets listed, so, that they can make as much profit as possible, but unfortunately, they tend to be disappointed when that coin end up not reaching their price target, even though they are still in profit, they will still complain because what they hoped for is not what they are getting.
This is completely natural with some people and most especially, in crypto where some people have to be believe in investing and harvesting lots of money in the shortest time period.