To be honest, it is human nature to complain and not be contented with how the things are. For example in Bitcoin's price, some people are complaining because its price is high because they cannot buy more coins but when the time comes that the price was down, they are the same people who would also complain because the feel that the value of their coins went down. People would tend to complain about something they they don't want and take the good things for granted.