The number one without doubt should be the country of the scammers, I know you should already have an idea of what country I'm talking about, oh and if you do not any idea what country I'm talking about then you never surf the internet, the country is called Nigeria.
South Africa
Kenya
zimbabwe
Ghana
I am African and in my country there are many Nigerians and from what I have seen for many years, Nigerians are responsible for many crimes in my country, from murder crimes, murder to albinos because of witchcraft, stealing bones from the dead in cemeteries , steal our gold, deceive the citizens of my country with their practices of witchcraft
Do not praise many of these countries because they are very dangerous, especially if you are a poor person
You mush have had quite an amount of experiences to be able to conclude that Nigerians are the only ones responsible for the social, physical and economic woes that have happened in your country but its important to know that all over the world are people who are deficient in morality are present.
The subject matter is about cryptocurrency, for me I would take South Africa at the top and not be blinded by population or being giant of a thing to decide. I have seen fintech companies starting out from South Africa and projects coming from there compared to other Africa countries then after that the rest of the countries can take the remaining slots.