system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do miners know when a mine is tapped out ? Or how they know where to mine in the first place?
gpt
> **when a mine is tapped out ?** 

they rarely know it that specifically but when they can't bring out enough valuable ore/cost they lose interest fast. there might still be good stuff down there and there might be nothing so you keep going until you start to lose profit and then you bail.