The sale of nonfungible tokens, or NFTs, fell to a daily average of about 19,000 this week, a 92% decline from a peak of about 225,000 in September, according to the data website NonFungible.

The number of active wallets in the NFT market fell 88% to about 14,000 last week from a high of 119,000 in November. NFTs are bitcoin-like digital tokens that act like a certificate of ownership that live on a blockchain.