It was created to be an alternative money.
I would add to this:
It was created to be an alternative money
for people who could not safely use normal money.
Bitcoin was never created to replace the US dollar, or even be a digital means of mainstream everyday transactions. It was specifically designed to create a means of value transfer for people who could not, for legal reasons, use an ordinary bank.
The blockchain architecture was designed to have one (any only one) unique advantage: to be able to thwart government interference and discovery into transaction. Whatever it might also do today (e.g. be an meme investment instrument), in its inception, that's all Satoshi was trying to do.
(And in the end he didn't really do that since a) Bitcoin has a public ledger and chain analysis allows governments to track transactions; and b) Bitcoin is, defacto, controlled by a small handful of companies that could be--or maybe even
are already--controlled by a government).
Bitcoin--and the blockchain architecture generally--cannot scale to even within several orders of magnitude of the volume necessary to handle mainstream worldwide transactions. And it was never meant to: only a
tiny niche of users have the "problem" that Bitcoin was designed to solve: most people don't need to avoid their government to make transactions.