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.
There are few countries where Bitcoin is Ban. but it is temporary. I think on people demands, Government has to lift this ban to allow people get the benefit as all other people of different countries are getting. So, sooner or later we are going to have bitcoin as legal definitely.
That's impossible, corrupted Governments will never make it legal, and if they does then they will loose all their power and control that they are enjoying on fiat money right now.