From the points of business ethics, information must be publicly disclosed which have direct influence on the market. This is normallly done by projects but there are some trades go on which is based on the news yet to be aannounced publicly.
Say, you are an employee of Binance. You know coin X will be listed in Binance after 7 days but this is yet not annouced publicly by neither Binance nor by the project.
We can easily expect that most of the times, Binance listed coins get instant pump and it's possible to get 20% or more even within a day.
Since you know the news before public, you can invest heavily before the news is announced and sell with a higher price when the news come and people jump into it.
This is kind of insider trading but not limited to. I have used an example of unethical behavior from only an employee who can be unethical but it will not be a surprise if a lot of the employees or someone from the projects do it.
This is very risky. You can also figure it our easily. Like, after annoucement just check what was the price changes before the news was publicly announced and try to get the causation of the pump. If there's no other variable having causation, it's certain that it's an insider job and you must not invest into that coin at that time because the price will fall shortly than you can imagine..
As I said, "The altcoin market is more complex than you can think of. You will be scammed which will not look like scam at all and will look everything normal to you."
This thing isnt new yet this is already happening on traditional markets where insider infos is there and being manipulative isnt a surprise.How much more into this cryptospace?
Its really plausible for its employees to take advantage into those possibilities since they do know that most of the time there would really be a pump after its listed.
How to stop such thing? You cant and no matter how you identify and minding those possibilities we cant stop those shady acts.They do know their advantage.