FOMO is a brain fart.
Every stock is available for purchase or sale every day the market is open. If I own UPST yesterday and hold it today after the runup in price, I’ve made the same decision as the person who purchased UPST today after the runup in price. We’ve both decided to own UPST at today’s price. We both own stock in UPST that is currently trading at the same price. Until one of us sells, we are one-and-the-same.
Lee