Riding a 🚀 or Holding a 👜

As a retail trader, how or why an institution bought a stock, we may not know the exact reasons. Maybe is their strategic planning or maybe is it a good price to stock up?
You can follow their BUYs, BUT do u know the exact moment when they going to SELL? This should be the "MILLION DOLLAR QUESTION".
It maybe too late when the news come out, as u still holding the bag. So the next Million Dollar Question for u will be,
HOLD OR SELL?