Per law, any asset is bought during your marriage time will be considered as co-owned by you and your wife (or husband). It should be split in divorce case.
How do we know if the BTC was co-owned after marriage or it was owned by the husband before he got married to the woman? This is why many men now request for Prenuptial agreements to be taken down among both parties before marriage in case of a divorce no one will feel cheated or used in terms of property sharing.
In some cases women now uses marriage as a means to escaping poverty and not going into marriage for the sake of marriage and this has made many men uncertain about the future of their marriage like never before. All of these has a negative effect on the lives of the children gotten out of the marriage. How unfortunate!