The idea you said is also good even though a couple who have been in one house can also share important information with each other even though they separate every asset they have at that time. Because when one of them dies, the other party can still take or access the wallet containing the Bitcoin assets so that the Bitcoin is not stored in vain even though it is not directly combined into one wallet. And I think that is very easy to handle as long as a husband and wife can be open to each other and take care of their wallets so well.