Only two make any money?

I was watching a re-run of one of last years ‘Sopranos’ episodes, and a comment was made that during inflationary times, when everyone is losing money, certain areas of the entertainment field, and the Mafia, always continue to show a profit. What area of the entertainment field was the speaker referring to? (Silvio said it)

Prostitution? Gambling? Either one would appear to also help the Mafia to make their profit.