I've seen lot's of people who complain to bounty hunters who dump their tokens after they get them. Why hate them? They have all the rights to sell whenever they want and bounty allocations are only 1%-5% of the total supply of the coin. I don't think it will do much to lower the price of the coin. I mean it's even good for the ICO investors as they will have a chance to buy more tokens with lesser price than the ICO.
Holding the tokens also doesn't mean it will make you rich. Some tokens get abandon by the developers so it would be better to sell at a good price than be left hanging in the end.
Yes it is true, holding tokens will not necessarily make you rich and not everything will go your way. So, don't just hold and wait for it to reach its highest point, do an observation about the coins that you have and do an analysis of whether the coins are possible to give you a big profit or not.