Some countries have silly limits on the amount of currency you are allowed to take out of the country. Bitcoin can function as cash in some instances and it adds to your spending budget, if you have a extra
method of payment. It's so convenient and fast, and hassle-free. You also have a lower risk of theft / loss when you travel abroad and you have no safe way to store your currency.
I would rather walk around with a mobile phone and draw little attention to myself, than carrying a wad of cash and painting a target on my back to all pick pockets out there.

I really hope your mobile phone never get stolen (or lost) otherwise you lost also your valued
BTC wallet. Here, a lot of mobiles are reported as stolen by tourists. Probably if use draw out an iPhone, the last Samsung Galaxy or any other valued smartphone, you're still painting a target on your back to all thiefs & scumbags in the neighborough.