Buying my first japanese sword

I wanna buy my first katana sword. But there are so many. And the price range is massive. From $50 to $25K.

Part of me even wants to go straight for an original Nihonto katana. But thats a few grand at the minimum. (Auction wise) Cause i am fascinated by the culture and a fake one would be like an insult?

It would be for pure decoration. On my wall.

On the other hand should we even want to have a legit piece of Japanese history in our homes? (Me being from Europe)

Im curious about opinions about owning (japanese) swords.