I believe that contained in all currency, whether digital or analog, is some notion of value. What is the next value play that drives up the value of a currency other than trust? Can intellectual property or thought be a currency driver? Crypto is mined when a problem is resolved. Can problem solvers be the next currency issuers?
I think in the next twenty years, the US dollar will be the default currency within the United States. As Amazon and other platforms replace the US public delivery structure, they will issue more of their own “currency” and compete with the US. They will become exclusive to their own members and keep low income people off of their platforms, especially as the affluent move out of large cities and into the suburbs, exburbs, and rural areas where they can find more space and be around fewer people.
Alton Drew's The Interbank Market 