Well, anybody can use any investment tool for that matter to make sure that he or she can be financially independent in case something untoward happen like a divorce. But come to think of it, the best thing to do is to have a pre-nuptial agreement that must state that any party of the marriage can get involved with cryptocurrency and that the other one will not any stakes on it...unless of course a partnership agreement can be agreed upon during the marriage. Anyway, we know how destructive a divorce is so I think the best thing to do is both parties work hard to make a marriage a big success.
I think all married couples are working hard just for their relationship to work and be successful so they won't end up being broken. Unfortunately, not all are lucky enough having their partners. This is where divorce enters.
However, its better to specify all your assets or investments, or even debts, be it in bitcoin, stocks, or real estate before making the prenuptial agreement. Particularly for big celebrities who also make big earnings. This will avoid the forthcoming problems that may arise in the future particularly to where the property will go after a marriage.
Because we are regular people so we don't think like them. Trust me, most of those marriages are Businesses, the man knows this woman will be happy to take off with half his wealth WHEN divorce happens and not IF it will, cos it will in 80% case so there is less trust so the best asset you can hide now would be your Bitcoin 
). But seriously, getting into marriage and then hiding money from my family members looks like a nightmare to me. 
