Fiat money, gold and precious metal standards and crypto currencies are all barter systems imo. I know economics academics might disagree with this notion. There isn't a massive or substantial difference separating a farmer exchanging 12 chickens for a goat or a consumer purchasing an internet domain name for 0.0005 bitcoins.
All these are exchanges, but you definitely can't call them barter. There is a reason why barters and fiat/monetary transactions are considered different. For a barter transaction, the farmer would need to find somebody who wants his 12 chickens
and has something to offer the farmer, which the farmer actually needs. If not for money, finding such a person would take forever.