Our top picks for Bitcoin exchanges: Cheapest Binance. IceCUBED allows its clients to purchase and trade in bitcoin, as well as many other alternative cryptocurrencies known as altcoins. Transfer funds into your account. Money transfer speeds. Users looking to buy Bitcoin in South Africa can do so from one of the many exchanges available in the country. For online purchases, you can use a checkout system such as BitPay, which facilitates payment for buyers with bitcoins.