It's a First, Christie's Oct 1 auction bidding will be in ETH. Incredibly, auctioneer will be calling out bids in ETH.

The Oct. 1 auction also marks the first time Christie’s live bidding will be denominated in cryptocurrency instead of the usual local currency. The bids, which must be placed in ETH, point to a new milestone as Christie’s descends down the crypto rabbit hole.

“I’ve been bidding in auctions on behalf of clients for almost a decade,” said Davis, the Christie’s digital art lead. “I’ve placed bids in USD, GBP and EUR – always fiat. To think I’m going to hear the auctioneer calling out my bids in ETH, that’s just incredible. It doesn’t happen.”

https://www.coindesk.com/business/2021/09/17/christies-to-sell-some-of-the-earliest-nfts-and-only-for-eth/