Bitcoin could be considered time once new Bitcoin stops being mined. Then it's not replaceable because there will be no new Bitcoin being put into the realm. We will be stuck with 21 million and that's it.
 
However, in my opinion it will be more like energy. Since Bitcoin won't be destroyed or disappear, it can't be time because it will never run out. However, it can't be created or destroyed which makes it energy.

AJ1992

mempool

I was listening to this video and he mentions how time is a physical thing and through pow satoshi was able to  keep time on bitcoin 

I never thought of it this way, which blows my mind that time is not digital but somehow he made it happen 

My question is, how is time maintained in bitcoin, and if it’s a physical “thing” are we not running into an oracle issue?

https://dergigi.com/2021/01/14/bitcoin-is-time/