Think of it this way, if you want to involve your wife in something that is still illegal in your country, that's not a very good move. You may cause problems and it may affect your relationship, because it depends on how your wife sees this as an investment or an asset. You didn't mention any views on your wife, so it might not be as good as we hoped.

Maybe invest your money from your bitcoins into something memorable for you and your wife. It would make a better wedding gift than bitcoin itself.