The first money from Wall Street to roll in will be from the gamblers...the true speculators. These are the guys who buy anything off the normal path in search of huge returns. They roll the dice and let it fly.
That will drive prices up, especially for BTC since that will reduce their risk a bit. After that, you should see volatility settle down a bit which brings the next wave of Wall Street money, the smart forefunners. These are the ones who always seem ahead of the rest of the crowd.
This, of course, will raise the prices while reducing volatility, which means the main part of the Street money enters...and that is the golden goose...TRILLIONS.....