Been thinking about the US and currency usage.
I think that 3 currencies might be used in the US in the future: a global currency (SDR's?) for international trade, a new currency for domestic use only and the US dollar, which will die a natural death. The new currency, controlled and issued by the government, will be used for taxes, wages, loans etc. The US dollar will continue to exist, but consumers would only be able to buy things in US dollars from those vendors who still accept them anywhere in the world. I think it unlikely that the US government will itself accept dollars in exchange or trade for the new currency. Doing so would maintain the status quo and that seems an unlikely course to me. Not accepting the old currency in trade will encourage innovation and entrepreneurship as well as restore a level playing field domestically.
A "reset economy."