You are using big words to try to sound smart, without understanding the specific details of the situation. There’s more than one group of “rich people” trading in the early market. Some are buying and others are selling. They are just moving money back and forth within the same “class” (as you understand it).
The other guy is wrong because in a situation like this there are very few buyers in the early market. He focuses only on the “rich” buyers and ignores the larger group of “rich” sellers trying to get rid of their shares. It’s much more likely that most “rich” sellers waited until the market opened because they didn’t want to sell while it was thinly traded.
So if you care about “classes”, the “rich” generally lost money because the company they already own went down in value. Maybe a few people bought at the bottom and sold when it went higher, but that was neither a large percent of “rich” investors nor a guaranteed return.
I’m explaining it to you because the other comment has a low level understanding of the specifics, while you admit you don’t understand. It’s more dangerous to think you understand something than to know your limits. I can trade in early / late markets but don’t because they have no one else there. The market has few other participants and that makes it too choppy.