For many here that are over weighted they (I) have acquired shares at a low price compared to the present price. So there is a considerable cushion against a serious share price drop.
Many would be in a position to recover most if not all of their original investment if moon shot does not occur and there is a launch abort. The analogies here are a lot of fun to work with.
If I had to build a position at these current prices I'd be much more circumspect about risking a large part of my investment capital.