Where can we buy time?

Excuse me, but could you possibly enlighten me on the concept of purchasing time? It's an intriguing notion that I've yet to fully comprehend. In the realm of cryptocurrency and finance, where exactly would one go to acquire such a valuable commodity? Is there a specific marketplace or exchange where time is listed for sale, or is this more of a metaphorical question, alluding to the optimization of our daily routines and investments in order to maximize our time? I'm genuinely curious to learn more about this unconventional idea.