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.
but what I am trying to deduced is that people are now now channeling efforts on the investment purposes than the transactional aspect of bitcoin.
You are right, bitcoin is straying from its original purpose but that is not its fault, it is our fault. Not only today, bitcoin has been used as an investment asset by early users since the early days and is passed down to this day.
But I think using bitcoin as an investment is much better than using it as a currency because if bitcoin is used as a currency. How many people will use Bitcoin when the network is constantly congested and transaction fees are unstable? How would you feel if your transactions were delayed and you had to pay extra transaction fees for your daily bill transactions?