Entropy
Entropy is a data structure that embodies the notion of time. In other words, it is a time-like structure.
Entropy is time, and time is money
It was Bitcoin and its mining mechanism/blockchain as a time-like structure show that it is possible to use time as a way to issue currency with physical grounded phenomenon.
References
Anderson, Walter. Study of Entropy. local page. Retrieved Sep 24, 2021.