This can’t be a serious comment. If ww3 starts the respective countries central banks will keep the gold for themselves. You are so naieve if you think any government is going to honour the fact that you have a piece of paper that saya you own some gold in their vault.
It is not like they haven't done lot to collect it off the population in such scenarios during previous crises. My guess is that if WW3 breaks out. For duration your gold will have rather little use. At best you get price set by government. At worst it will be confiscated. And black market will probably be only place to use it.
And post WW3. If there is economy left. It will be while before people lock back on gold.
