Any financial advisers out there?

I live in south africa and have a mate in london who owes me money, now i have a choice... he can either send me pounds or convert it to Rands (interest free). The exchange rate a month or so ago was +-R13.00 to the Pound and now it's R14.56. Is this just a sudden spike and will drop (in that case i'll take the Rands) or will it continue to climb?