Earlier quoted context omitted.
Bitcoin is attempting to BE value better than fiat. There is a possibility that we eventually achieve a bitcoin circular economy. In such a scenario, Bitcoin does not go up or down against fiat because there will be no demand for fiat.
There's no potential scenario where that happens (only scenarios with no potential to occur in reality). Governments are not going to give up the critical aspects of economic control and self-determination that come from national currencies, generally. They could already do that with gold, and they overwhelmingly have had absolutely no desire to do it (for obvious reasons). If Bitcoin gets a lot larger and a lot more…
Maybe not in your lifetime. But you’re not practicing long-term thinking here. Global, trustless, decentralized networks allow humanity to fundamentally reorganize. Physical, nation-state borders are ignored by such networks. Cooperation for physical resources still does matter but that may also be lessened by technological leaps in sectors like energy and food production. Humanity, if lucky enough to not be oppressed by ultra powerful governments, will likely render federal/central governments much less important and thus much less powerful. Simply put, the value proposition of central governments is now on the decline.