If people started using it as a currency, Bitcoin would've beaten banks already.
But Satoshi never mentioned that he created bitcoin to beat banks or replace fiat. If we use bitcoin as a currency and use it to beat the banks then that is our goal not bitcoin or satoshi.
Because in the end Satoshi did not create bitcoin as a competitive material but as an option for governments who feel that bitcoin is disruptive and categorized as a competitor it will be a different story because it is the assumption of those themselves who sometimes do not like bitcoin not from the purpose of bitcoin itself.
For now I prefer to say than bitcoin can further develop its potential instead of getting out of the predetermined path of creation because even though the goal remains the same where bitcoin can be used as an alternative to means of payment but there are more developments that bitcoin has where they can also be used as investment assets for now or maybe trading and it's not out of line because the goal remains the same it's just that the development is more than previously thought.