I would suggest that in these times, all re-read the presentation. That is what I always do. Then I wait until I believe the drop has flattened out and pick some more up. I believe the time is nearing to monetization and PTK's coming out party. Like FJ mentioned, the real value of this company has only increased of late. Best time to buy are in times of fear. Though we all hate these weeks where the stock price plummets, they prove to be the most lucrative in the long-run for those whose thesis has not changed.