It won't hurt to order for separate hardware wallets, one for you and your partner, so whatever you are able to safe up won't be revealed to anyone of you guys, you have your private keys and so is your partner, this is much better than sharing the same wallet.

There will be a problem in the future if two partners are buying and storing BTC in one wallet, people forget things easily, one can say he has send up to 0.6 BTC while it is not up to that amount while the second might also do the same, misunderstanding can take place.

DCA separately, it is best for both sides.

I dont think there is a one-size-fits-all approach here.  What works for one couple might not work for another.  Like with most things in a relationship, talking it through openly is most important.

the way I see it finances should be a team effort in a partnership.  From budgets to long-term savings,money stuff impacts both people so it makes sense to tackle it together.  But every relationship is different so couples have to figure out what financial dynamic aligns with their values.

It should or should not depend on how both of them see the future of Bitcoin. Besides, whatever the investment made by either husband or wife is an investment of the family. Therefore, it is not necessary for us to focus solely on Bitcoin. It could be best to invest in other investment platforms as well for security reason.

As long as each of them shows transparency, it will never be a problem whether the time comes for them to divorce. It depends on how they talk and trust each other. In fact, they are not worried about divorce, but it is for someone who spends money secretly.

It's possible to do that, and if the couple has one mind, they can decide to invest in Bitcoin together just as they both need to be present before you can make a withdrawal from a joint account. They can also use a multisig wallet for that, which they can both see the transaction inflow from, but before anyone can spend funds from that wallet, the permission of the other person will be required to authorise the transaction so that the thing you call a security concern can be solved with a multisig wallet.

I think this kind of thing depends on the initial agreement because when there is mutual trust between us and our partners, openness is definitely important as well as in investment matters but that does not mean that those who do it separately are also not open to each other but maybe there are some things that need to be considered in the end.

I personally am currently still trying to separate the investments made because I currently keep my portopolio in 3 different wallets even though I also sometimes fill the wallet more but it has been intended for my children and partner from the beginning. So in this case I give more access to my partner for his wallet although it is also at my discretion and sometimes I also fill it but I prefer this separate method where I, my partner, and my child have separate wallets to invest.

This doesn't mean it's not open but it's a form of commitment and convenience. I am comfortable with this condition so I continue to maintain it and do not make one wallet to be used together.

If the both parties agree to have a traditional currency joint account and they managed it well without a controversy or any extraordinary issues, I think that they may manage same wallet, so what I want us to understand is that with trust and agreement in marriage, everything can be possible, but some people will not agree to have a single bitcoin address as a joint one, but people who has understanding can agree to have same or one address, but people who doesn't understand each other can never agree such instead they will have different address.

If you both have the same goal then I don't see any problem why you both shouldn't have same portfolio but if not then you should have your own separate one. The reason for that is that you might have different crypto that you guys want to invest if you want to invest different crypto with bitcoin as the main investment. You can also do both where you have both portfolio and also have your personal investment. You can also have your own, your partner's investment and both and your partner's investment.

Based on all the previous physical of Bitcoiners by their family, friends, and sometimes the people who are not blood related who know about their Bitcoin holding. I will never advise anyone to invest in BTC together with their husband/wife. However, if someone must do something like combining BTC investments, some necessary things need to be put in place to prevent future issues.
For example, you need to make sure the person is not greedy, there's a need for legal signing, multi-signature, and more.

Should be separate for a lot of reasons.

opsec

is big.

also should be a pair of  hardware wallets  one for wife one for husband

if usa based two PayPal accounts one for wife one for husband
if usa  based two coinbase accounts one for wife one for husband
if usa based two kraken accounts one for wife one for husband


so a total of 8 places with coins.

and ratios should be

85% in the wallets 5% in PayPal kraken and coinbase.


that would be fairly safe way to do things.

obviously do not have too much in btc and no cash in case you need cash for real bills.

Ie if you have 85,000 in the wallets and 15,000 in the exchanges

you better have decent cash somewhere  just in case.