For me, when the coin is already listed in the exchange site there are chances that the price will rise because it is already in the exchange site and the owner and together with the team will surely do their best to make it more popular in the market
I am confused with your statement, looks hard to understand.

Yes, a coin that is already listed on an exchange probably has a chance to increase. But not all coins can be like that, some developers or the team of the projects don't really care about the price development. Some of them just let the price decrease because they think it is normal, they said to the investors (holders) to focus only on improving their products. Over time, all team members disappeared and are no longer active on all social media channels.