Monetary sovereignty is an ambiguous concept here in Africa. Many countries use the Dollar as acceptable forms of payment, and countries surrounding South Africa are susceptible to the strength of the Rand compared to say the Namibian Dollar, Botswana Pula or Zim Dollar.. So when many nation's already rely on a secondary currency, why have that currency be the Dollar? Make it a single currency, which works across borders (a major factor for Africans as many work in other countries and send money home) and begin to stabilise African economies together, rather than one at a time via the China/IMF's predatory loans.