I have an open bag of ground coffee in the fridge - it's been there for probably a month and a half. Is it safe to use? I searched, and everything says coffee goes bad after a week or two. Is this for quality purposes only? My question is, obviously, does it go bad as in can it make you sick? Does anyone here know for sure?

Sure, I could throw it out and buy new coffee to be sure but I'm really making an effort to stop wasting food and money out of needless fear, if you know what I mean.

Thanks in advance for your replies.