Depends on how many of them already got out. From the volume and price action it seems that the float must have been traded through at least a couple of times. Those in early hopefully did the smart thing and took profits, and if so a majority of shares are now in hands of people who bought higher. You are right that if a lot of people from low levels are still in and cash out this will tank, but IMO most of those people probably sold a long time ago. The float is small enough that if there is sizable buying pressure in the morning it will continue its run. We will just have to wait and see.
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