It's really hard for BTC to be a good hedge because of its volatility. Imagine you wanted to avoid losing your wealth to 2% of inflation per year so you decided to put your life saving in Bitcoin a few weeks.
No one puts his savings in Bitcoin for just a few weeks to hedge fiat's annual inflation.
As you know, Bitcoin might not be the best hedge against inflation short term wise, but if your time horizon is at least a couple of years, the volatile nature of the market in the short term shouldn't be much of a bother with how Bitcoin only needs a couple of months to undo years worth of inflation. Charts don't lie. It's there for everyone to see.
In the end, there is a risk to anything you do. It doesn't matter what asset you choose as hedge against inflation, nothing guarantees that it will work as intended if you only park your capital in that asset for a short period of time.