Also if Robinhood wins this, theoretically they can do the same to $AAPL, $MSFT, $AMZN , now how does the uber rich , fund managers, union funds, 401k etc etc w

Also if Robinhood wins this, theoretically they can do the same to $AAPL, $MSFT, $AMZN , now how does the uber rich , fund managers, union funds, 401k etc etc would react? where does this stop. Its either a free trade market , or its not!