Reading this thread, it sounds like it's a very bad time to have your VC go bad. Which happened to me today (Radeon 7850). Sigh.
How would a person know when the cryptocurrency has crashed? I would think that once the price crashes, then there will be a flood of used, reasonably priced cards on the market.....which might bring the new card market back to earth. But it's quite possible I don't understand the VC markets and how they work.
I'm really thinking my best bet might be to buy a really cheap VC (sub-$75) and wait until winter. Coincidentally, I had intended to upgrade my entire system in January.