You're right about that. Unpredictability is what makes this game so exciting. I bled off a few percent of my shares on the ride up, and am sitting on my remaining shares as we ride down. When the stock was skyrocketing, some people took this as proof positive that the trial results would be good. Now that the stock is tanking, some people are taking it as proof positive that the trial results will be bad. The simple fact is that nobody knows what the results will be.
To put things in perspective, even after this morning's big drop, we're still WAY higher than we were a few short weeks ago.