I'm not entirely sure if I understand what you're saying completely, but if I do, then that's even _more_ to my point I made.

If I have $100M to invest, why the hell would I go on Coinbase like a common day trader millenial looking to make $2500, rather than use Gemini Trust to store my millions, where I could save hundreds of thousands or millions of dollars using their auction system?

To loosely use an analogy if you will, Robinhood is to Coinbase as Vanguard is to Gemini.