No, Receiver. Just no. Sometimes curiosity is the wrong approach, and the Bearer of Mind your own business is pretty sure that this is one of the times. Somewhat rude, perhaps, but such directness is occasionally necessary when dealing with an improper or needlessly persistent enquirer.
Possible responses are varied. Receivers accepting themselves to be at fault may use Sorry or Fair enough, while those understandably regarding such a gift as a hostile gesture have This means war! or a laconic So it has come to this at their disposal. Confusion as to the rationale for such a dramatic dismissal can be communicated with Something I said?, and those eager to pursue their enquiries despite the Bearer’s reluctance can send What's troubling you? or even Please in an effort at persuasion.