Fraudsters posting fake ads on social media and posing as high-profile investors like Cathie Wood, Steve Cohen and Bill Ackman have swindled victims out of hundreds of thousands of dollars. Wall Street Journal contributor Randall Smith joins host J.R. Whalen to discuss. Listening on Google Podcasts? Here's our guide for switching to a different podcast player.  Learn more about your ad choices. Visit megaphone.fm/adchoices