It is more than that. You probably consider it an investment, but it is also a medium of exchange, or a currency if you prefer. Acquiring Bitcoin to fight inflation is not a bad idea, but it is better to do so because it does not depend on a centralized entity to transfer money or wealth that can censor you, and because it has a finite production, as opposed to the potentially infinite production of the currencies we use on a daily basis.
To be used as a medium of exchange, Bitcoin is still a bit limited because it can only be used in a few countries, which means that not all countries can use Bitcoin as a medium of exchange, although it can still be used as an investment tool and commodity asset. And given its very limited production, Bitcoin is clearly a very suitable investment asset in the long term with the hope of increasing its value in the future.