Now that Bitcoin has worldwide acceptance, why not introduce Bitgold.
Nick Szabo came up with the idea for Bit Gold prior to Bitcoin. It still involved “mining” but not for actual Gold.

What if there was a secure central depository of audited non-hypothecated Gold on a blockchain. One could present their Bitgold wallet with the appropriate security features for loading on a Worldwide debt card like “WISE” in the local currency. Could be completed online or go to a secure Branch for picking up local currency. DeFi.

If the internet goes down you would have the same concerns as Bitcoin.
It would be the same as carrying a few gold coins but could not be stolen physically.

I like Gold in my possession but for travelling this may be an option.

The other possibility is to purchase Bitgold before you leave your country and when you reach your destination redeem for actual physical gold at a secure branch. No border to cross.

Just a concept.