That is one of the usual Bitcoin investment strategies, after all. However, we cannot ignore that the effectiveness of Bitcoin and FIAT as saving vehicles are very different, no one (few people, I assume) keeps money as savings, because the inflation, while Bitcoin is deflationary.
That itself makes it better than FIAT in long term.
indeed when we invest in Bitcoin of course our goal is to make a profit,
long-term investment in Bitcoin is of course the opportunity to generate much greater profits.