Like does the project team tell you when they are going to dump and you sell before they do? Or like they tell you when they will use the funding they have to buy and you buy before them or something?
Trump memecoin recently launched and some people with inside information made money because they're the first in line to buy it but others that can't after the memecoin started to trend won't make much profits. Inside information is one advantage that not many people are going to get but if you're privileges to have it, don't misuse it or you'll be caught and punished. There isn't alot of people with inside information but only a few people that are close to the owners of the cryptocurrency get this information.
Inside info works in the cryptocurrency market the same way that it works in the fiat world. Some projects that are scams or have intentions to scam people, the owners tell their friends when to sell and get out because they want to dump the project.