You only can do that in few countries in which Bitcoin is legalized already. Beside in which countries Bitcoin is legalized already, you can use Bitcoin to pay or purchase anything you want but in other country where Bitcoin is not legalized yet, you will have to exchange it into local currency to pay or purchase and it's the same with my country.
Even in some of the countries where bitcoin is legalized, just few of these institutions are really collecting bitcoin for fees and I heard globally, Nicosia has the highest number of institutions so far that receives bitcoin as payment.
It is a matter of time before we start seeing some of these institutions and even merchants all over the world springing up and I feel we will get there pretty soon.