I agree with what you have said,I don't hold tokens as many as yours I am only holding the tokens I got from bounty campaign and I'm still holding them because the price is low and it's only a small amount that's why no problem if I will hold for long time.
Holding ICO tokens from bounty campaig is good at the start to give the token a chance to have gains in the market. But, past experiences with bounty tokens made me regret. Most bounty tokens instead of gaining in value, they decrease in value. So, better to evaluate each situation very well.
That's because majority of the bounty hunters always dump their tokens after receiving it. Not allowing the token to gain value. So, always pick the token which you think has a high probability of gaining value to hold.