My great-grandparents died in Europe in the 40s. The only thing of value they were able to get out of Germany was my great-grandfather's stamp collection. I have one third of it. I do not believe the other two-thirds survives.
ML/NJ
Only when you can find a market do things like art or stamps have value.
Silver and gold coins for the interim. Almost always a market.
Storage food, bullets etc, always a market.