An economy based off of nothing but barter is a fantasy. It can exist out of dire necessity but lugging gold around, not to mention firewood, is impractical so more practical proxies arise, for instance silver notes, then comes a desire to secure it from theft and fire, then interest, then loans. That isn’t going away.
The value of bitcoin such as it is, is in future applications of the transaction. The individual transactions being speculated upon at present have no value to anyone other than speculative, though.
Calling Captain Obvious.