what does that mean by in terms of currency ?
you mean what is Bitcoin ranking in terms of value with other currency ?
if you're asking that question,i think we should make it clear that Bitcoin is not a currency and only an online payment.
which mean it'll never be a currency,
indeed in terms of value,Bitcoin price is extremely high other than else or we called it the highest.
because it's globaly used by people while currency itself is not really that useable globaly(even though we can exchange it),
but it will never replace currency/fiat even though it's easily used by people.
at least for now i can not see it.