In the end, investors buy stocks to make money. When a stock is up big, it’s tempting for some to “pull money off the table” and sell some shares. But that could be a big mistake. On a Fool Live episode recorded on June 30, Fool contributors Brian Feroldi and Brian Withers discuss programmatic advertising leader The Trade Desk‘s (NASDAQ: TTD) most recent results and whether investors should sell after the big run-up in the share price.