I am living in Europe and I am considering buying gold to protect my money in case of a possible crash. My first idea was to get bars of gold and leave them inside the vault of my bank. The main problem seems to be that I will not be able to utilize these bars of gold right after the crash, because they are way too big for small transactions. It seems to be better to buy several really small pieces (about 1g each, current worth about 50 Euro or 71 Dollar) and keep them at home.
What would be a good mix of bars? 5000 Euros (or 7100 Dollar) in gold really small to be liquid after the crash and the rest in the vault? Or would you consider the vault insecure after a big crash and everything should be kept at home? I am not sure what I must consider in such a situation. What would be a good approach?