bitcoin can be used in a lot of things! It can be used in nearly everything normal currency is, its just that we need to get people to use it and start accepting it. Theres hardly anything it cant be used for!
Where can you use bitcoin again except in this? You just can use bitcoin as a payment or may be trading or buying things. You can't use that in other ways like you said
there are other ways that i'm not aware of, which a currency can be used? i'm astonished here really
dude those are the only ways which every currency can be used, fiat is not excluded