To add on to the serious answer:
There may not be much of a Sicilian/ Italian Mafia around but there are plenty of other counterparts out there taking their place.
The Yakuza. Japanese Mafia. Enforcement in Drug Traffiking, Prostitution, the whole nine yards. The difference here is that they have big time ties in certain big name companies and they are very public…Super Public in fact (They do interviews with the head honchos sometimes on TV) Also they believe in honor to the ninth power and there has not been something like the teardown of the Italian Mafia.
The Triads. Chinese Mafia. Actually they are the main counterparts to the Yaks and have a pretty firm grip on the opium traffiking of Asia (big time commodity there)
They actually are made up of Korean, Chinese, and other non Japanese.
Russian Mafia- Heavies of the defunct country in the big time weapons dealing. They have raided most of the armories and nuclear arsenal and are selling to the highest bidders. And that is anyone that can come up with the cash may possess nuclear bomb making capabilities.
There are several other lessers. Turkish Mafia, Jamacian Mafia, Columbian Cartel, etc. etc.
What is the truth is that since the big busts of the Italians and others, the Mafias have really made themselves a lot more shielded and their operations a lot more hush hush. They are out there but they are not going to be hugely busted anytime soon