keep it out of water, dont get it knocked it should last a while, but you can never be too sure if it's actually that thick. it also depends on the quality of electroplating used, if it was electrical or chemical or wrapped, etc. even the thickest gold plate will fall off if they do a dodgy job at that stage.
I treat my reps as if they costed me the complete price, so ive never had an issue with scratches though.
maybe you can be a tester and let us know after a few months if the gold stays on