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.
I agree with you, because I also experienced the same thing. but as we know that almost all ICOs use the ethereum platform and ICO coins will also be exchanged with ethereum, as we see now that the ethereum price is very low and it greatly affects the price of tokens from the bounty.