Bitcoin proponents keep misunderstanding this. Most of the world's assets are not currencies, they are stocks, bonds, land, etc that we do use currencies to price but we are not holding currencies when we own them. The fact that central banks can inflate currencies doesn't change the value of assets just their pricing under those currencies. So creating a new way to price assets with something that has a guaranteed fixed supply is not a big innovation. If you want that just use gold. It has a much longer history, much less volatility, much less chance of being replaced by the next fad, and isn't mainly owned by a few recent early adopters.
>presumably because it's better in some real way than other currencies.
That's the point someone still needs to make. Modern financial systems are pretty efficient and featureful. Bitcoin is for people that believe in a narrow scenario where normal institutions have failed and yet the internet and the mining infrastructure is still working. To me that seems incredibly unlikely especially given how mining economics and evolution have made it highly centralized in a few players in China.
https://www.wealthdaily.com/articles/who-owns-worlds-gold/24...
And it's far from immune to being manipulated.