SBD isnt safe from volatility either. Actually, if it does what it is made to do, which is pegging the US dollar, it is looking at a 40% loss. Holding on to it, at this level, makes no sense from a financial point of view.
So please, for the very reasons you state, at least consider to diversify your development funds into other currencies. Unless of course I am completely wrong in my understanding of SBD. Simply ignore the above in such case ;)