A temporary drop in value does not accurately reflect the long-term value of a project. In fact, it is necessary to wait to see if the project holds value long-term, that's why it's called "long-term"! The first moments after being added to an exchange are usually periods of extreme volatility, though maybe it's also a great opportunity as a coin-holder - you can sell your coins and buy them back for cheaper, for example. Trading always carries risks, but the extreme volatility is surely a sight to behold. If the project is a valuable project, then long-term its true value will always show. Nothing to worry about when it comes to short-term drops. But the problem with that is, it is not easy to wait through such tumultuous times!