Hold and if you did your research and still trust the project, buy more once it's cheap! Don't ever get into a position where you can't afford to hold. Even if it's bounty tokens, just hold. You didn't pay any money, so you can't loose any. Any project needs some time to grow and gain hight. And yes, some will crash. So spread your risk and accept that some investments will fail, even if it was a good project.