This is very stupid.  There are laws for it.

LAW: 'when man and wife quit, property is split'

Bitcoin is just property.  Even if you argue that it is 'intangible' property, it is still property.  You have to split it.  By law.  Bitcoin doesn't magically change things such that old laws no longer apply.  Fraud is still fraud, tax is still tax, divorce is still divorce.  Stop pretending the Bitcoin upsets all these well established principles.  That is precisely what caused Ross Ulbricht go to jail for the rest of his life.  He made the mistake to think that because Bitcoin was not technically 'money' that he somehow wasn't the biggest drug dealer ever known to the world.  Very fucking dumb.  Bitcoin doesn't magically make all laws go away.  Don't be an idiot and spend your life in jail next to Ross.  

The guy should give the bitch half his Bitcoin and then go make more.  Don't get married again.