You are kidding right? All that matters to anyone that gets paid in bitcoin is the value of the bitcoin at the time they were paid and the value of bitcoin now (or when they exchanged it for fiat or goods if they have already done so). Someone that is trying to make a living is not going to care about any kind of average
I.E.... I just made a multiple holiday purchases at amazon for 15 % discount with BTC with Purse.io and those coins were purchased @ 110 usd so my discount was much greater.
and how will you feel if those 110usd btc's you spent are worth 10,000usd in a year ? many early adopters and miners sold tens of thousands of btc when it hit such milestones as 1 or even 10 usd etc
the network is still being built and strengthed ,nobody knows how much a btc will be worth in x amount of years but i have an optimistic feeling about this technology