Can a coin with very low 24hrs volume still brings profit?
Theoretically any risk taking behavior can bring profit. Question is are you willing to take the risk or prefer to stay away from shady coins that have no value in the world?
For example zclassic, the volume isn't even up to 20k in 24hrs, is it worth the risk or it's a big no for you? What do you think about this?
Low volume coins can be pump and dumped by whales and not just "can" but will. Because some bagholders of these coins exist, you are likely to see movements like that happen before you know it and therefore not putting your money in it is the better and safer option.
Problem with altcoins: No real use case any more than tokenising everything craze which died down and was fake hype anyway. The coins that lingered at low prices still are always the point of curiosity for low cap newbie traders. That is a trap that the newbie traders should learn to avoid.
Of course if you are one of the bagholders then you know what you need to do.