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As @goldmatters has already posted, some already do.
Another major driver will be when employers see that gold can be used for transactions, as well.
I've paid for masala milk here in Dubai through Goldmoney gold.

I would love to see more steemit users posting pictures of themselves using the goldmoney mastercard

Some already do :) There are advantages to merchants to become business account holders. This is already happening, but now its available in the US!