I'd guess that it never trades on major exchanges vs national currencies, well not for long anyway. It's just so much better that once it has comparable adoption it will end fiat completely. Wide adoption is the only problem with bitcoin imo, and that is temporary and will eventually benefit from positive feedback.

Bitcoin is a P2P computer program. It is not a currency, a dessert topping, or a floorwax.

The dollar is a piece of paper with funny drawings. It is not a currency, a dessert topping, or a floorwax.

Gold is a metal. It is not a currency, a dessert topping or a floorwax.

The us dollar is designed to be extremely difficult to duplicate identically for the very reason that it is used as a currency and if it were easy to duplicate then it would be fairly easy for many to create their own wealth while also drastically decreasing the value of us dollar.

Bitcoin by design is impossible to duplicate and is thus a best implementation of currency afaik.