I don't think any movie that starred Leo DiCaprio and was directed by Scorcese will ever be considered cult classic. In fact, Scorcese and Leo DiCaprio collaborations are among the worst of Scorcese's body of work. Reminds me of an Allstar sports team that never wins a championship. Only reason why Gangs or The Departed can be considered somewhat cult is because D.Day Lewis or Nicolson pretty much carry the performance, not that Leo is a terrible actor because he's not, but I've never walked out of a Scorcese X DiCaprio film thinking "wow, what a memorable figure DiCaprio played".
As for Wolf, I've seen it all already in Boiler Room. Nothing new about it other than Wolf is based on a true story.