The case of inflation has always been present ever since the current fiat system is in place. But, is Bitcoin really the supposed solution to inflation? I don't think so. While Bitcoin's fixed supply is obviously a design which particularly protects the people from the continuous debasement of money due to abuse or indiscriminate printing and injection of new supply to the circulation, it was never a guarantee that the price value of Bitcoin will always move upward. After all, Bitcoin's price is solely determined by the market.
Also, you cannot expect Bitcoin to address the current problem of a different system just as you cannot expect the mechanic to address the problems faced by physicians. Are we a Bitcoin economy? No. Is our existing economic paradigm parallel to that of Bitcoin's standard? No. Are the world's population, companies, governments, and others living according to the principles of Bitcoin? No. We are living in a fiat world, so why are we surprised if we are facing fiat problems?
Bitcoin doesn't necessarily have to increase in price for it to counteract inflation. In any individual's financial repository, as long as they have an asset that doesn't, by design, lose 2 percent annually, their purchasing power can be maintained. It used to be gold that was tucked away, now it's crypto. With currency inflation, the purchasing power is guaranteed to decrease, but with Bitcoin that isn't a factor. Bitcoin is the solution and it doesn't necessarily take a price increase in order to appreciate the decentralization component. We might be living in a fiat world, but with the inflation rate for most currencies, not for long.