In my humble opinion, don't do anything your wife isn't comfortable with. I am sure you can make the case for a reasonable bitcoin acquisition when you sell your home and settle on what the down payment for the new one should be. Even though you came to bitcoin later, don't feel like you need to play catch up. You are still way earlier than most people and understand it better than 99% of people.

It's good that your wife is involved in family finances. My wife just looks at our joint account balance going down and assumes we are poor. She hasn't quite grasped the income poor, asset rich strategy I am going for. She keeps telling me to get a job. Haha.