"According to Brazilian press reports, the police found Steynberg in possession of two fake IDs, two laptops, a cellphone and six credit cards."

Here's an example of another ponzi scheme (Crowd1) that preyed on Africans:

BBC Documentary - Unmasking the Pyramid Kings: Crowd1 scam targets Africa (51 minutes): https://www.youtube.com/watch?v=M0EjjArvzXA&t=1s

Technically, it wasn't a "bitcoin scam" ... it was a ponzi scam in which bitcoin was the (primary, or only?) payment method the scammer organization (MTI) accepted.

"The investigation also found that MTI had over 16,000 Bitcoin of claimed customer investment funds unaccounted for."

Here's the link for the Chainalysis claim of this being the "biggest bitcoin scam of 2020" https://mybroadband.co.za/news/cryptocurrency/386664-south-africa-had-the-biggest-bitcoin-scam-in-the-world-in-2020.html