Even if you were R100k up I would have closed it, because as you said, you "accidentally" opened it and do not know what it is or how it works. IMO and from my limited experience, that is not the way you want to trade. First start small and familiarize yourself.
But yeah, that is just my 2c. Looking at things, you might hold it and end up with a profit, but still - you do not know what you are doing at the moment and than in itself is more dangerous I think.
Thanks AJS. Just started with it and the not know that 1 pip = R50. Thanks