The future is now
and it's called gold-backed stablecoins: physical gold stored in a vault, digital record of the ownership of that gold running on the blockchain, for convenience 
I know how Gold ETFs are being traded and are pegged with real-world gold for the convenience of people to trade in it. I was trying to emphasize the importance of digitalization and automation, the world is changing and physical gold has been replaced with digital gold, but I didn't know the transactions of these digital gold are also being recorded on the blockchain.
This really makes things transparent but why would a person chose a blockchain method if he is using the centralized method already, giving up on the anonymity factor. So why use blockchain as in my opinion for Gold it is a little bit risky.
But if blockchain is only being used to prove ownership then that's another case.
Hi Faisal
You are right in saying that coins and bars cannot be used as money anymore.
Digitalisation and automation, indeed.
ETF shares cannot be used as money either.
They are a vehicle to
invest in gold, not to
pay with gold: You can neither go to the restaurant and pay with ETF shares, not can you buy on eBay those shoes and pay with ETF shares, nor can you send 3 ETF shares to your brother.
As money ETF shares are useless.
This is were blockchain technology is going to revolutionise our money system: in allowing the hardest currency in history to become money again, as gold-backed blockchain based currencies."why would a person chose a blockchain method if he is using the centralized method already, giving up on the anonymity factor."
I got the same question a couple of days ago
here, so as I've not much to say

I'm going to repeat myself.
It's a trade off Faisal:
opportunity vs. anonymityFor some people the opportunity of buying/selling gold with minimal spreads... sending/receiving it digitally... having it stored in fully insured, military-grade security vaults... managing everything directly through your smartphone (no financial advisors who know everything you do...)... the chance of paying directly with your precious metals through a debit card, no need of a bank account! (which is important for unbanked and underbanked people) (... but also for fully banked people who don't like banks

)... extremely low minimum trading amounts... the option of redempting the coins and getting the corresponding physical sent at home...
... for some people - think for ex. of the
Indonesian who are registering in the PosPay app of the Indonesian Postal Service - these
opportunities are more important than
anonymityBetween opportunity and anonymity there is no right or wrong choice. We are different and we live in different situations.
It's a personal choice.
But it is important that you look at this issue not only from the point of view of a crypto user but also from the point of view of
ordinary people:
the primary role of gold-backed crypto currencies - in my view - is to serve ordinary people, not crypto traders