Anybody that rely on his Bitcoin investment to feed his family after marriage is obviously not ready for the marriage because Bitcoin investment is not an investment you would venture and start expecting daily returns, so anybody that have such mindset in planning to married will actually get himself chocked up in the marriage.
It is true the marriage can chocked up at the moment but if the investors plan is to invest for a long term and still keep on accumulating more Bitcoin using that DCA strategy to accumulate Bitcoin and continue hodling there will definitely be a moment of joy in the family and both couples by the time Bitcoin price start going high because his Bitcoin investment has yeild out enough profit. Everything is about planning and what you want for your self.
Maybe the reason they go choked on their invest are "Their financial capacity is not really prepared for marriage life set up or They are immature to handle such situation and they are happy go lucky guy" that's why they choked up on their long term investment made with bitcoin.
If they make their selves became financial stable then everything will be sorted out according on what's best thing to do on this matter.
Also if the investor knows how to deal related to their investments and separate their obligations to their family then everything would provably work out. The most important of all is to explain to your wife that you have this investment and you need to separate a desired amount since you are dealing with bitcoin for long term. For sure everything will be understandable and all will work out if proper discussions will be made.