Altcoins are really scary, if you can do some research you will see many good altcoins that had very good start and value in 2018 and are still alive today but we never heard anything good from them anymore for some reasons, they are now like ghosts, honestly altcoin investment is more scary, this is why its better to always take profit, most especially from new altcoins, Profit is Profit, either big or small.
I have myself experienced similar situation in the past but these decisions are very complicated because you always have hopes about the project. Sometimes you see small negative things about the project but you try to stay positive and ignore those but i think when you start seeing such things it is better to exit than seeing the ship crashing.