In general people regard gold as a safe haven asset because it is rare and therefore has value. This may be true but if your government passes a law banning you from owning it you could find your wealth is taken away from you by the state.
Far fetched? Not at all. The US government passed exactly this law in 1933 and did not repeal that law until 1974.
Bitcoin is not owned by and cannot be controlled by anyone or any central authority. Be your own bank. Be your own reserve.