As a buyer, you are safe (unless the bitcoin skyrockets then you will be kicking yourself and the vendor will reap the benefits) As long as the vendor hedges, it really doesn't matter what the bitcoin does. And yes, you are right. Once you have purchased the product, you are locked into that price. But, if the bitcoin drops, and the vendor didn't hedge, you will see a lot of them cancel the order, they dont want to take the loss. I have never done that, most reputable vendors won't do that, but some small time vendors have no choice. They cant take the loss ( i believe if they cant handle the swings, they shouldn't be in the biz) But, we are really talking about 2 separate things..