yeah but it was private and presumably a pretty limited number of people knew about it at the time which narrows down the number of potential candidates pretty considerably.
There are so many other ways to do this that are infinitely harder to track. Suppose token X is going to hockey stick. You can short a derivative that shorts X. You can long a derivative that longs X. You can leverage a lending protocol that contains X. Etc.
"Buying X when X will go up" has got the be the most unsophisticated way possible one can leverage insider information. Not to mention a basically guaranteed way to get caught.
