The phrase not everything are meant to be shared can be contradictory sometimes. Bitcoin can be a shared investment, if it is properly arranged. Imagine a couple is using a hardware wallet and the device can be stored in a vault where two individuals can have one part of the piece to accessing the vault. By now we must have watched movies where the keys in accessing a secured file is separated only one of the keys cannot open it. That is the same case i am explaining here. Sharing a Bitcoin investment account is possible if it is properly planned.

My own personal advice would be for couples to invest alone if they intend to make active transactions on it, like trading, etc. They might be a couple, but their views on when to trade and when not to might differ. If there are losses, it could turn into a blame game. Business is business, and it is always advisable to keep some level of emotions out of it.
Unless they only intend to hold for the future, let’s say they plan to make it a will for their kids, whether born or unborn, then they can keep buying and holding together for that sole purpose.
At the end of the day, the couple should do what is best for them.

It depends on the situation or personalities.
What if both of them are knowledgeable in crypto but have a different opinion on alt coins, or what if they are in a verge of breaking up?
It is good to have a partner with a similar mindset or have the same interest as you, you could both have your own investment or portfolio or just combine your investment to make it grow.

I agree with what you said, mate, if that's the case I totally wouldn't have any problem to do so but where which there's no such trust, it is what it is. In one of the old threads that I am talking about, I have shared the story of a man in my place that was dealth with by his wife, the man was rich, trusted the wife with all his asset but after he died, the wife didn't even give any piece of the wealth to the children as if they were not her kids.

I'll say yes, couples should share their bitcoin wallet. But some might think of it differently. Many like to keep a secret savings without letting their partner know about it so they can be used as an emergency fund or maybe to purchase something which their partner won't allow to. For me, I love riding and mostly spend a lot on expensive equipments like jackets, gloves, helmets, etc. My partner won't let me spend so much on these equipments because I hardly go on rides here. I usually go for a ride maybe once a month and that too if my office plans group rides as it is not really safe for me to go on rides alone being a girl. But even for those rides, I like to be fully prepared and have all my accessories with me.

So in my case, I have to keep a secret holding to spend on these things which I won't let my partner know about so I would personally keep a bitcoin wallet which my partner is not aware about.

Such questions are born out of so many situations and from the look of things the ops sounds as if someone has trust issues this is somewhat a big deal for the ops and for sure as investors there are what we call personal investments and joint investments in a family setting and for me I think every individual have the right to invest in whatever sorts them because when it comes to Bitcoin investment a lot of couple may have different and opposing stands towards that.

Two good heads they say are far better than one, if the both have the same interest, doing it together can enhance the investment in terms of finance, time or attention given to the investment. However, there are couples who might not want to have a share of the same investment we still have to respect their own opinion on standing on their own rather than having a joint investment, if they can invest together is ok and if they can not it is still ok provided it is their personal decision and choice. But the truth remains that two good heads will surely supercedes one good head.

Two is indeed better than one, it is really just that there are those individuals who do have some trust issues despite of being married to other person on which they cant really be just that comfortable into the money that they are saving up and this is what i can say a little bit ridiculous but there are people who are really that like this. It is really just that too laughable that conjugal property isnt really that being applied or it isnt really been that considered by some couples or married person. Well, there's nothing we can do if they would really be having that way because its their money being saved and not ours. For me then i might consider out too on having some own savings on which that it is really that on my own and not being told into my wife. We do know that there are some needs that we do want to buy and doesnt really like on always asking for our wife to buy us with that. This is the main reason on why i do keep myself always having some extra fund but when it comes to investment or simply with my crypto holdings then its laughable that even myself do really comes up with this kind of idea. So it will really be that up to you on how you would really be that handling out when it comes to financial matter because in the end of the day when the family is experiencing some financial difficulty then it will be both husband and wife would really be coming up with solutions and this is where usually their investments would really be coming out when they dont really have any options or solutions into their problems. Separate portfolio isnt really that bad but it would be better that you should be letting your wife do knows or telling each other in between about your holdings since the budget do really comes from in between your incomes.

Money is money, you can't combine money with love, family, friends etc.

I don't think it's good to combine them, there's need someone who can make a decision instead of making decision from two or more people. When you add more people to make decision, it's usually create a drama and you have to spend more time to make decision.

That is what they all say until things begin to go sore and then we begin to hear regret from both parties of how they would had invested or saved separately. There is a high rate of divorce form marriages and many couples that were once love birds become enemies that are ready to kill each other. To prevent having regrets, both parties should just have their separate investment accounts while they do things together as a family. Both individuals do not having the same emotional control as one would want to sell while the other will prefer to keep holding therefore having separate investment accounts is a better solution to avoid arguments and disadvantages between the couples.