Bitcoin can have non-monetary based inflation. That is, if something else goes up in price faster than BTC, then it "inflated" in terms of BTC. Cost pull, demand push. Econ textbook stuff.

But it can't inflate from currency debasement. Because BTC can't be printed. It has fixed supply.

If you have $10 and 10 apples, each apple is worth $1.

If you have $50 and 10 apples, each apple is worth $50.

The latter can't happen because of BTC's fixed supply.