If you really want to answer your question you will need to spend a few minutes researching the project. If you like the sound of the project and believe it has a future you should hold. Airdrops are good in that they disperse tokens to a wider audience. Projects that are better distributed tend to be less susceptible to whale manipulation and overnight dumps. In my experience if you hold for 6 months or more the tokens tend to go up again after the initial dumpers have exited.