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If you are traveling and lose your credit card, but in a country that has a reasonably active Bitcoin scene, you can sell some BTC to pay bills while "over there".
This may become an issue for us.
Here is a case for having an online wallet, "travels anywhere".
this will be beneficial only for countries that accepts bitcoin payments, as of today, we are still experiencing limited purchasing power using bitcoin, it is still best to travel to countries that are open to bitcoin, if not, you still have to use the conventional credit card or cash. but i think, in the near future, lots of merchants will be engaging in btc trading and e-commerce, meanwhile, let us all be patient.