It is because that project isn't listed yet in the market. Because if it does, everyone is selling then and could dump their coins bringing them to buried fast. And the other reason is that the developer itself doesn't have the plan to spend money from getting listed, their intention is only to scam people. a lot of similar scenarios have been happening already, they use social media to manipulate people and you are one of them.

Well, the wrong this is that and surely gives you a lesson is to make a search first before investing. Perhaps, you can avoid it actually if you are not in hurry.