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.
Those countries dont like changes in the money system and doesnt want their people to use any king of money than the conventional currency but soon those country will change its mind and will allow to spend the bitcoins in their country.