You just need to always check for the update and wait until it gets listed on the exchange, because for sure its gonna drop its value and it will take time for you to recover the money you've invested. But some are good for long term and the price of its token could reach your target value.
If you are here for long term, that is not gonna be a problem.
If it will dump, it will start dumping from the very start of trading and as an investors it's against our will to sell lower than the ICO price, otherwise
we are just wasting our money when investing. Patience is very important, the market will eventually turn into bullish.