Sure, it is our treading currency and It will replace fiat currency one day
everything can happen and all possibilities can occur along with the development of technology and time but to replace the fiat currency is very difficult and still requires a long enough process and time the most important legality for all countries may be the official currency and substitute fiat currency
Worth to be currency doesn't mean replacing fiat right? some people use paypal also and worth to be used as a means of payment but it does not mean replacing fiat. in my opinion at this time though bitcoin is worth to be used as a payment method or currency, bitcoin has a rate to be used as a medium of exchange, and currently there are also many merchants who accept it.