Gold does not have a clearly total supply like Bitcoin.
It is easily portable like Bitcoin.
You need to have vaults to store gold bars.
I don't think it is as portable as bitcoin. Carrying 100k usd in gold may be quite problematic, and as you said the storage is a lot more complex than using a bitocin wallet.
2. Gold has limited portability and divisibility.
Bitcoin only fixes #2, so I don't believe that governments will voluntarily switch to a Bitcoin standard. It will take a failure of their currency and a potential reliance on another country's currency to get them to switch.
Governments and banks already figured out how to increase gold supply. There is a discussion about "paper gold" , where people say that those gold etf might not really have all that gold backed up, but have some of that value in usd or other assets. It is possible that there is already more paper gold than gold.
In the future it is quite possible that banks will do the same with bitcoin funds and etf... holding physical gold or bitcoin is certain safer.