I can't think of much really. I suppose you can use it when you want to buy illegal goods online?

Travelling internationally doesn't really matter much to me. When I go to other countries, I can pay easily with my debit card. When I shop online, I use paypal.

I think Bitcoin's selling point is the fact that it's decentralized and "anonymous." Though when it comes down to it, how many people actually care about those features? At this point, I think more people are in it for the speculation and making quick profits rather than belief in the protocol.