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.
Bitcoin is not banned in actual, the news that a specific country has banned bitcoin is just the rejection of governments to use it, which is all over the, none of the government has approved bitcoin till now.