Well you can forget fast food because of the transaction time with Bitcoin and who could afford
to tip the waiter after being mugged by BTC miners for $30 per transaction.
if the road is broken then no point buying a car.
I want to be the optimist. Yes, the experiment might fail now, but it will get international attention. <Good or Bad>
When the Lightning Network is fully adopted, we will have near instant transactions and it will be virtually free. <No 3rd party needed>
Bitcoin with Lightning Network, will knock their socks off. I think a lot restaurants and fast food places will accept Bitcoin, after the Lightning Network is launched.
KFC will be seen as a Early adopter of the technology, by the time when the rest catch up to them. ^smile^