remonetization       
noun [ U ]  finance & economics specialized (UK usually remonetisation); (re-monetization, re-monetisation) uk/riːˌmʌn.ɪ.taɪˈzeɪ.ʃən/ us/ˌriː.mɑːn.ə.təˈzeɪ.ʃən/
 重新货币化
the act of changing something that is no longer recognized as money back into money
  They make a case for the remonetization of gold in the global economy.
 The group's main aim was the remonetization of silver. 该组织的主要目标是使白银重新货币化。 
  - More examples
 - The remonetisation of gold and silver is not likely to happen any time soon.
 - They favour the re-monetization of precious metals.
 - The value of silver will probably increase as the re-monetization process continues.