This.
Same as if a group of nerds found value in moose shit, a DOLLAR value would be assigned to the moose shit. And for a fleeting moment in time, people would talk about that crazy time when people where paying for mooseshit.
As long as there is a tiny segment of people willing to exchange DOLLARS for bitcoin, there will be a tiny segment of vendors willing to accept it. The second that market begins to tank, all vendors will drop support and that will be the end of bitcoin.
Take this Porsche for example. They will accept BitCoin, but possibly not mat market rate. Most car vendors I have seen work out a deal to get the BitCoin below market then immediately try to sell. I was talking to a local guy at Tesla about it. They are taking a short term bet in hopes of increasing their profit more so than actually "selling" the car.
I don't see how that model works long term but we will see I suppose!