This is true. And in addition to bills payment, you can also find some Bitcoin ATM stations around the world in case your Bitcoin wallet is already dwindling in BTC and you badly need to deposit some. However, I am afraid this is not as widely distributed as we may want it. We have to admit that while we really want to travel anytime and anywhere we want not using the traditional wallets inside our pockets, we might really find it hard to survive with our Bitcoin wallets alone, especially if we are not really after the huge cities of the world but some hidden gems in the far-flung areas of different countries.