The craze, which made news last month when Buzi started to hide cash in envelopes around San Francisco before posting clues on the internet, is due to hit London next.
Buzi, a 43-year-old property investor, told the Daily Telegraph cash from him and wealthy friends would be hidden in a yet-to-be-decided large park in central London.
Each envelope contains around £100 and once hidden Buzi tweets cryptic clues from the an account with the handle @HiddenCash, which now has more than half a million followers.
Twitter users thought the free money drops were a hoax at first but after they had been proved real drop sites became overrun with treasure hunters.
Buzi did not respond to a tweet, but a Royal Parks' spokeswoman told Horticulture Week: "We don't know if it is a Royal Park but have made the Royal Parks police aware just in case.
"It's a wait-and-see situation as nothing like this has happened before so we have no idea if the grounds will be inundated by people or if there is a risk of damage.
"The Royal Parks police are aware and so are we, so if it is one of our spaces there may be a few staff members out there with everybody else."
Those who find the envelopes are encouraged to share pictures of themselves with their winnings on the social media site.
"We want to see how London goes first and then we’ll decide whether to expand it around the UK," Buzi told the paper.
"Londoners are big Twitter users so I’m sure there will be quite a crowd. You guys seem to love a treasure hunt so it could become a scramble for the money."