I think yes bitcoin is the one world currency because this form of currency is use by many people scattered in the whole world Thus bitcoin became the one world currency.
Possible without any government interventions this system can be used as world currency, talking
about online transactions, it's very capable doing the work.
If we use bitcoin as currency to buy something you don't need to reveal our locality to determine when country you from that why it easy for use to use it where we are.
Can process the transactions without any needs of personal information the concept of P2P
is vey likely to proceed. Good enough if most people acknowledge and use this chain.