If a coin is still very new to the market and it is having a low trading volume at the same time, I think it is a good time and avoid opportunity to acquire more.
Although, this is not applicable to all coins. Based on what I have seen so far, a coin that has a good product, perhaps actively under development and has such experience while listed, investors most times make good use of the opportunity, by acquiring more.
Remember that the bitcoin start on a low trading or even low supply before. It's up to the project admins and participants if they continue to develop this specific alternative coins.
There are some have started with the big volumes and demands. You look so pathetic dude, how that can depends on the developer if they have raised a lot of money from the crowdsale? they must pay what they have got from the investors. The development is a must after they have been getting a lot of money.