Id argue its not inflation since the total amount is predictable and verifiable in the code. 21(ish) million already exist in that sense.
Discussion
It's subsidizing miners who put downward pressure on the price when they sell newly minted coins to cover cost. It's penalizing hodlers to prop up miners.
But it's also exponentially decreasing over time and there is 100% buy in from all market participants. So it's a lot different than fiat monetary expansion.