It is never a good thing to sell below ICO price.
It is not also good to sell at exactly the ICO price.
There were times sold when i was not supposed to sell. Just because of the excitement of receiving tokens through bounty participation and perhaps through airdrop, i was eager to cash out.
Most of the times i did this, i always found out that i later ran at loss, not considering my effort and the time spent in promoting such project.
I could have also had 2x and sometimes 10x the ICO price, but impatience made me to loose the opportunity.
My last experience was on a token i received. Mentioning the name will be of no use, but for crypto enthusiasts to also learn from my mistake. Ever since then, i have learnt to hold and this has been profitable to me.
No matter how you got your token or coin, always try and be patient enough to hold until you are in profit.
It's a good thing for all people who already learned their lesson about being a trader in cryptospace, because for a newbie trader, it will happen too, whenever the price is falling down we tend to sell all of the because we panic to lost our money