Even if people will start making a plastic cards in different countries you will not have a chanse to pay with bitcoin cause it's illegal, better to leave bitcoin now and wait when it become legal everywhere.
There are countries that bitcoin is ban but most countries have embrace bitcoin and companies there are now investing and making a move for local user of bitcoin to used their bitcoin locally.
But it is hard to ban bitcoin in any country, as every bitcoin user is not relying on their overnments for its usage, bitcoin is controlled directly by the users.