This might seem like the first answer that will come to mind; it is natural to imagine what will be the concern of the OP if the early participants sell or not but if you view it from another angle, the OP might have raised this thread to find out some of their motivations for holding that long so that others will learn and also follow same. If this be the case, a lot of new Bitcoin investors will appreciate the long term perspective of Bitcoin rather than seeing it as a quick profit venture.