You can barter with anything you want, that doesn't make it a currency. In fact, bitcoin has a way harder path to being recognized as a currency explicitly because there is no army to enforce it as a currency. That means it can only really be a currency by consensus, and if walmart and kroger don't take it, good luck making people agree to it being a currency.
Bitcoin does not meet the desires laid out in the whitepaper, not even close. Bitcoin isn't even a currency by it's own standards.
Barter goods also serve a purpose other than as a medium of exchange. And Bitcoin is legal tender in El Salvador (not that I like El Salvador or their Bitcoin law), so it actually is a currency.
At least with barter exchange tends to happen in person so you can figure out if you're being scammed before you hand over your goods. Bitcoin gives you the worst of all worlds by making the exchange completely impersonal while lacking the ability to look your counter-party in the eye. The two are most decidedly not the same.
Nothing stops you from exchanging Bitcoin in person, though, so I’m not sure what’s been lost there. Bitcoin can also use a multi-signature escrow. Many services are set up like this.
Gold and precious stones can also be mediums of exchange. That doesn't make them currency.
A currency has to be widely accepted as a medium of exchange, and it has to have a relatively stable value. Bitcoin fails bitterly at both of these. And experiments with bitcoin payments in the mainstream quickly failed (Steam, Tesla).
Your definition of a currency is incorrect. Many fiat currencies have experienced rapid devaluations (hyperinflation) while still being recognized as currencies. El Salvador has recognized Bitcoin as legal tender, so it also has at least some recognition as a currency. The IRS has not updated its guidance.
Bitcoin does not meet the desires laid out in the whitepaper, not even close. Bitcoin isn't even a currency by it's own standards.