Don Corleone is depicted as one of the richest and most powerful mafiosos in America in The Godfather, and the movie mentions a few ways he made his money. Rewatching The Godfather today, it holds up for being more relatable than most gangster movies, because its really a story about a family business. The family business happens to be organized crime, but it couldve just as easily been a restaurant or a dry cleaners. Its more about how the next generation inherits the business than the business itself.