ソース:[1] Christie’s Closes Digital Art Department as NFT Market Stays Frozen (https://www.coindesk.com/markets/2025/09/12/c ...)[2] Christie's NFT Exit: A Missed Innovation Moment - AInvest (https://vertexaisearch.cloud.google.com/groun ...)[3] NFT sales hit $2.8B in first half of 2025 as trading volumes tank - Cointelegraph (https://vertexaisearch.cloud.google.com/groun ...)