This question can be answered in different ways depending on someone's understanding and leaning of the term "safe asset" because for sure we have different convictions, and we are in different situations. Gold is considered as the safe haven for sure and in case of a war this can be a good asset to protect one's wealth, not unless of course we are already looking at the end of the world scenario where I think foods and a solid shelter can be more important. Just like gold, Bitcoin is also considered as a good store of value and nobody can steal it away from you because it has no physical presence.