But it's not, which is why the question failed. Inflation is technically the failure of the dollar. BTC is a hedge against the failure of the dollar measured by inflation (currently there is an anti-correlation between the dollar and BTC as measured by the DXY. When the dollar goes up, stock, and BTC go down, and visa versa). But the same can be said for other non-dollar assets, securities for example. They are referenced against the dollar. Their value is not the dollar. The real value of gold is not in dollars either. It's value is measured against the dollar, which has been upheld by the petro-for-dollar agreement, enforced by the threat of war. The dollar is a metric, like the metric system, or the imperial measurement system. The value of those measurement systems is their relative usefulness. Any currency that was declared "legal tender" by a nations government could become the prime metric by which other stores of value are measured. The dollar is useful as an ubiquitous medium of exchange for any and every single good or service in the nation, and to some extent, in other nations. BTC does not function as tender, let alone legal tender that anyone and everyone MUST use in exchange for any and all goods or services. It doesn't function as tender because it does not yet move fast enough, although that is being rectified by the lightning network, or something similar. It is mainly a store of value that moves fairly well. As such, it is stronger than the USD (as a store of value) but not yet as strong in terms of speed of transfer and ubiquity. It could be legal tender if a nation declared it so, for use within it's borders. With the speed of a layer two, it would be as useful, if not more than the USD, simply because it's inflation is better managed and transparent, rather than determined behind closed doors by cigar smoking oligarchs.
Again, if i sold you my nipa hut in the Philippines for one BTC, i would tend to measure the transaction relative to the Peso, not the USD. This would be because if i lived there, i would have references, in my head, what, and how much of the goods and services i could buy with the local legal tender. Is the "real value" of BTC the Peso? No, it's the failure of all the fiat currencies of all nations to be good, honest stores of value, as well their failure to be transparent about their creation and distribution, which erodes their usefulness as stores of value. They have only always been fairly good as mediums of exchange, relative to all known goods and services. As such, they function like grease in the wheels of the economy. BTC could function as such, if given the chance. That is a political question. Meanwhile, it has one basic job: reliably store value and make stored value reasonably movable from one wallet to another across the globe. The ubiquitous measurement of exchange (the currency of any given nation) will be a reference point for measurement of properties and commodities. The value of those properties (BTC is like a property) and commodities is not the currency.