I used to invest in ISO and make a profit. Recently, a lot of coins in which I invested fall down after entering the stock exchange. I do not know what to do about it ...
I consider those coins that failed to get a listing as scam coins, it's part of the roadmap, investors are investing because they want to trade the coins in the market, if the ICO does not have a plan to get listed in exchange in their roadmap, people will not invest on it.