This is like a viking asking what the value of a silver pennigar is in 2024. Which you probably wouldnt understand because they dont speak modern English. And even if the conversation were mutually intelligible, most people wouldnt know or care what a silver pennigar is to be able to give an answer and the ones that do would point out that because that particular coin hasnt been used at scale in commerce in hundreds of years, it doesnt really have a modern answer aside from "this is a collector's item not a form of recognized currency." And even if it did, its likely not going to be easy to explain what that value is in a way that they understand. i.e dollars wouldnt mean anything to them and the value of most things has changed dramatically since that time.
Maybe, but I know what a Roman denarius is, and that was used 2000 years ago in a region I've never lived in.
If even a single full node was still running and a single service was willing to exchange it, you could in fact look up the price. And if digital currencies continue to be a thing (seems likely to me), then exchanging between them may not even require a third party, it will likely be possible to do within the protocols.
Personally I think it's not an unreasonable question. A bit boring, but I see the appeal.