Thanks Gazza1, hellscabane and Disastrus. The trade lag/speed issue seems to come up often.
I do wish that some exchanges that trade many cryptocurrencies only allow the trade of coins that maintain enough activity.
Why is that? Is it because there are too many coins displayed in the interface and you want to filter just the active ones (remote the clutter)? Or because the buy/sell orders don't execute when there isn't enough activity? Or something else entirely?
Mainly issues with perceptions and there is a higher likelihood of easy manipulation for coins without much activity. I don't think there should be a daily minimum, but maybe if a coin's bi-weekly moving average dips below a certain point, consideration to phase it out should be made.