The solutions to these kind of problems are fundamental. But no one wants to face them.
Yup, without economic basis in physical sources of wealth with stable economic value (such as precious metals) a currency is doomed, yet in my humble opinion there is a preferable alternative to the historic and relatively unproductive store of value in gold, namely the productive capacity of the land for all its attributes. Without productive basis in land an agro-urban civilization will eventually wreck its soil and hit the wall anyway. So a currency based in the productive capacity of land is a way of increasing the monetary base with which to supply capital to an economy with capital requirements to implement the advancing technology that also increases wealth. Thus, such a system would have a structural motive to manage ALL the land to increase the underlying reserves for its currency.
Unfortunately, the agro-urban tendency is to crush or assimilate the people who care for the land in its mad dash to grow. It's been invariably true since before Genesis 4 was written (and that is exactly what the Hebrew actually says).