physical cash or fiat currency
I am so sorry , what is the difference between them , Do you mean Physical cash as gold or something.
There is no difference between them I think he just forgot to add if it's an online currency(like Debit/credit card/bank) and physical cash on hand like you said you have paper cash that is physical cash.
How about buying BTC at any available Bitcoin ATM near your area there is a limit buying BTC on ATMs that do not need KYC verification.
No ATM here (Macau)
This is, in my eyes, the best shop in HK.
Unit 51, 1/F, Admiralty Centre, 18 Harcourt Rd, Admiralty, Hong Kong
I don't know why you don't react to what I write, I bet in this thread I am the only one who actually has experience with buying crypto in Hong Kong. Anyway, in this shop they take usd and hkd, when I bought for 1k$ they didn't ask for KYC, don't know how it is when you buy higher.
According to coinatmradar there are no atm or exchanges in Macau, so HK is your only option if you don't find a person to help you.