The Wolf of Wall Street is based on the real-life Wall Street broker Jordan Belfort, but is the real Jordan Belfort in The Wolf of Wall Street? and the ex-convict has a hidden role in the film. The 2013 movie follows Jordan (Leonardo DiCaprio), who becomes greedier with every deal he makes, working his way up from selling penny stocks to working-class citizens to scamming multi-millionaires. However, the story is just as much about Jordan's pleasure-seeking habits as it is about his criminal business. Nevertheless, when the FBI inevitably gets involved, Jordan's Wall Street empire comes tumbling down.

https://screenrant.com/wolf-wall-street-real-jordan-belfort-role-explained/