It was created to be an internet currency. Satoshi made it that way. But after a decade it found a different, much stronger use case. History knows lots of inventions that was ment to do something but after a while someone found better/different usecase for it. Bitcoin is one of them. Stable coins on fast chains like TRX or BSC serves much better as internet money than bitcoin. I pay/recive payment almost every day. Most deals are made via BEP-20 BUSD. But am I holding it as BEP-20 BUSD? No, because I dont trust it. Its fast and easy to deal with but not safe to store wealth for more than its needed. So I transfer value to bitcoin to store it there. Especially if price goes down and we are far from ATH.
So bitcoin is more like an internet gold rather than internet currency.

I don't think that investors buy bitcoin in 2021-2022 because they bealive its going to be used as internet money in future. They did that in 2009-2017.