Something will eventually replace fiat maybe even in our lifetimes. I always figured it would be some form of ID at birth that can follow you around all your life. Maybe DNA account assignment or fingerprint/retina scanning. People can be assigned government credits by employers and deduct against them for things they want to buy. This would have the side benefit of eliminating many types of crime that revolve around untraceable currency.
The Irony is strong when I compare the above with your username.
This thread isn't labeled what does QA want to happen. Change will happen whether I want it too or not. I'm not sure most people would want what I want. If I were king all drugs would be legal, prostitution would be legal, cigarettes would be illegal, we wouldn't embargo countries just because we don't like them or their leaders, we would stop imprisoning people for being poor, the Dept of Homeland security would all be taken to the Whitehouse lawn and shot as traitors to a free nation, no more holding people in jail as terrorists without trial. No, a lot of people wouldn't like my country.