While there been deals I regretted (spending BTC on random crap before it rose in value), in my case it's.. never!
Haha what crap did you buy? This is one of my main fears of spending BTC right now. I've already made nearly 1000% profit on my BTC, so I'd still getting a ridiculously good deal for my coins, but I don't want to order a pizza and a few months later have ended up essentially paying a stupid amount for it.
or it could go down and you will have the cheapest pizza ever.