In my case it was TF2 items. In retroaspect though, I was using BTC I just bought with fiat currency to buy said items, and I was getting a really good deal at the time. I bought up BTC later to make up for it (BTC that I told myself to not spend until the next reward halving), and said loss is becoming more and more of a distant memory. Certainly not as bad as the 10K BTC pizza at least.

I don't think we see another crazy BTC rally anytime soon and we're entering another stable but boring price period after the months past fluctations, so I'd think right now is actually a safe moment to spend (and buy) BTC.