Bitcoin is a technology that makes our life easier. It does not melt in the face of inflation like fiat currencies. It frees us from the bondage of banks, as it allows us to transfer money without the need for third parties. It has great features.
This part of advantage of bitcoin over fiat is a major plus but regarding to inflation I think it may not be direct or always but also remember when the price of bitcoin is down then it can be affected or is affected by inflation since the value of 0.005 btc during a bull time is not same value when price is low. So the fluctuation of bitcoin to many can be argued as inflation. If you look at the experience of the bitcoin investment of El Salvador, that is an example of drop in value compared to the price it was invested on. Therefore using bitcoin as a reserve is still debatable.