Bitcoin has many advantages as it make you financially stable but on the other hand fiat is accepted all over the world while bitcoin is not accepted worldwide like fiat so it will take time but for financial freedom bitcoin is always best option over fiat and anyother currency.
Because Bitcoin has a better and greater level of financial freedom than fiat, most people who have known and owned Bitcoin will always keep and store Bitcoin after they buy it using fiat. And if there is something that can be more valuable to be owned by everyone in this world, of course they themselves will also see if it can be obtained by relying on fiat. Because people who are willing to throw away fiat for something more valuable will never lose financially, especially when they want to get Bitcoin through the market which can still be done by entering fiat into the market.