Cybercrime detectives began investigating a criminal syndicate’s alleged money laundering via cryptocurrency in October last year.
The driver Yi Zhong, 30, was stopped on Homebush Road, Strathfield, about 5.30am on Monday and taken to Auburn police station.
Police say two bags containing $1 million in cash were found during a search of the vehicle.
During a search warrant at a home in Wentworth Point, more cash, more than one kilogram of methylamphetamine, cocaine, mobile phones, a laptop and electronic storage devices were also seized, police said.
Philanthropist MacKenzie Scott, one of the world's richest people, has re-married after her 2019 divorce from Amazon CEO Jeff Bezos.