The marijuana business is big, and is only forecast to grow larger. Private equity firm Privateer Holdings estimates the market for marijuana and related products, both legal and illegal, could be as big as $50 billion in the U.S. and $200 billion worldwide. For now the biggest problem facing pot entrepreneurs is financial services because cannabis is not legal at the federal level. Take a closer look at the growing cannabis industry from the Marijuana Business Conference and Expo in Las Vegas earlier this month.
—CNBC's Harriet Taylor
Posted 23 Nov. 2014