The problem with backing something with gold is that it can be confiscated. The worse the economy gets, the more draconian the state gets. Doesn't help that homeland defense has bought about 300 bullets for every american. Too big a risk.
Yeah, well, I'd assume it would be like bitcoin now. Not everyone would put all their money into the system backed by "gold". Most would store it physically. You only need around $10,000 to conduct most transactions. This could be lifted for business owners. There would be public service annoucements made on the website and youtube videos to advise people of what the system is actually used for.
Either way, I'm starting today.