Yes! They will all eventually adopt Btc. Besides I find more importance in New Zealand's tax authority to approve crypto as compensation for salaries and wage-earnings, then Burger King.
We are nearly coming into the realization where crypto being use as a currency. Good thing it started with some food chain accept this and not a question nor to wonder that many establishments will follow by then.
What we are looking now is the support from the government as well as from the community. With the increase number of users will help to fully developed cryptocurrency in a matter that is not just an investment but a currency as well.