This is why you do not disclose your crypto stash to someone else, not even your spouse unless you trust them with your life or you believe that they aren't with you just for the money. The last one is very difficult to prove especially nowadays that a lot of people only want to exist and be showered with affection and pampered with material things. That is why I do not really agree to speed dating up to a marriage, not unless you know your soon-to-be spouse since childhood and you are sure that they won't flip the switch if it ever comes to that.

Hopefully though, the husband gets to keep whatever crypto he has for himself. It's bullshit that your spouse get to keep half of what you built way even before you guys met while the other doesn't really help add any value to your life in case you get separated.