There are time-honored traditions that date back many decades. There are century-old marching bands and pulsating techno hits. There are rampaging animals, covered wagons, antique cars and even storied rocks. There are quaint customs and there are controversies -- it wouldn't be college football without controversy, right?

The NCAA expressed concern over the lack of guardrails for online prediction markets after financial company Robinhood announced Tuesday that it's allowing trades on the outcome of college football games this season.