Adding a link that explains how we can construct a mapping of real world time to monetary units [1]. This enables us to run an experiment where time is money which I believe may be the first global, open and permissionless experiment of such kind. I think Grin (accidentally?) implemented this monetary experiment first in 2019.

[1] https://gist.github.com/phyro/27e4100255bdf8be79a19bc98750944f