system
A chat on subreddit /r/wallstreetbets
human
It's only worthless of expires OTM (out of the money). In your case if the share price is *above* your strike price its OTM. So if your long put closes *below* the strike price + the premium you paid you're good to go. 
  
 It's the opposite for a call. If the share price is *above* your strike + premium then you are ITM (in the money).

gpt
So I would have made more money if I just let it expire?