I know that you are sincere, so I want to tell you what I appreciated... as a wife. :p This is a cool realization you had and I think it would be great to show her how you use bitcoin naturally in your life. But I hope a larger conversation about bitcoin's significance can be had. Like if you were to ask your wife what she thinks her money will be worth in ten years? If there is something you guys are saving for, ask her how she thinks it would be best to save it? Explain why you think bitcoin is better. Does she think privacy is important? Maybe have that conversation. Because she's your wife, she's doing life with you. I think the more energy you can spend on the grander life choices and why you align with bitcoin ethos on those things, you'll have a much richer dialogue.