I don't see the US dollar losing relative purchasing power that fast, there are hundreds of fiat currencies that will fail first, those people will then need to choose what to move to, either one of the remaining fiat currencies in their region, the US dollar (most likely) or Bitcoin

So when a fiat currency fails after being crushed by the dollar, it will gain strength from that new demand so I think this game plays out for a lot longer. I don't even think we'll see that price point in my lifetime and if it does get there or even half the way there would we even be measured in USD

The real question is, can the USD lose so much value by 2038 that 1 Billion buys you a loaf of bread?