I'm also guessing from the orginal post that it isn't a move that would happen any time soon and that the OP is simply trying to ensure that were they to get a cat and then move to a different country in years to come, they could take their cat with them.
Many people these days end up moving abroad either through their job or because there is a particular place that they have always wanted to move to. However it's hard to know when this change could finally take place for a lot of people so you could be talking 5-10 years before actually making a move. I personally wouldn't leave it that long to not get a cat when i don't know when / if it will definitely be possible to move to another country. So i think it is just as responsible to make sure that the possible places you might move to would accept the pet that you want to choose should it be an issue later.
For example, i have never wanted to live in england all my life. I lived in Oz for 8 months and absolutely loved it there and would love to move back if i got the chance. Similarly i am also tempted to try and make the move to America. I therefore consider it in my life plan to move to a different country eventually, however i want to build up my career / experience here before considering moving esleswhere, as does my partner. This is a lifelong plan and may not even come into effect for another 10-15 years, maybe even longer but perhaps if an opportunity arose maybe earlier! So putting off a cat for that future plan wouldn't make sense to me...better to just know that should it happen, your cat can come with you and you can keep them as comfortable as possible during the process