I just see that BullionStar in Singapore, the bullion dealer, has just started accepting Ethereum, Bitcoin Cash and Litecoin as currencies for buying gold and silver. BullionStar was already had been accepting Bitcoin since 2014.
"BullionStar adds Ethereum, Bitcoin Cash, and Litecoin as Payment Options and Currencies"
https://www.bullionstar.com/blogs/bulli ... urrencies/