That's an interesting thought because I look at it still in terms of fiat. Isn't that comparison the entire reason why it's becoming so popular and rising so fast, though?
If that interest wains, so does the use case and value, if you ask me... but I still, personally, think it will be viable in the years to come. Maybe, just maybe, in the future Bitcoin will be the Global Currency... or perhaps it will be a different Cryptocurrency that's currently worth just a penny or 2 now that becomes more valuable.
That would be interesting to see.