If you would look at bitcoin's history, you will be able to observe that it is indeed possible. Each coin has its big break every year and the one you expected not to rise may have the capability of gaining very large value. There are a lot of people who used this opportunity wherein they buy such coins why it is still very low and hold it for a year or more till its price goes to the sky. People won't be holding any of their coins if this is not expected to happen so before selling your coin, think first, it might go over the roof sooner.