It is reported that the transaction volume after the theft of the NFT market 'OpenSea' will decrease by 37%.

It is reported that the transaction volume of the non-fungible token (NFT) marketplace 'OpenSea' has decreased sharply in the wake of the NFT theft case with a total damage of about 200 million yen or more.

OpenSea NFT Heist Triggers Sharp Decline in Platform Activity --Bloomberg
https://www.bloomberg.com/news/articles/2022-02-22/opensea-nft-heist-triggers-sharp-decline-in-platform-activity

Recent OpenSea NFT Heist Reduces the Platform's Trading Activity by 37% – crypto.news
https://crypto.news/opensea-nft-platform-trading-activity-37/

How OpenSea Users Lost $ 1.7 Million in NFTs to Phishers
https://tech.co/news/opensea-1-7-million-nfts-phishers

On February 19, OpenSea had an incident in which 254 NFTs worth a total of 1.7 million dollars (about 200 million yen) were stolen by phishing scams. The details of the theft case can be found by reading the following articles.

254 NFTs totaling 200 million yen are stolen from NFT market giant 'OpenSea' --GIGAZINE

The damage amount of 1.7 million dollars is the amount sold by the hacker, and since some NFTs have not been sold yet, the total damage amount is from 2 million dollars (about 230 million yen) to 3 million dollars (about 340 million yen) There is also a view that it goes up to). The stolen NFT also includes four works by Bored Ape Yacht Club (BAYC) , a well-known monkey profile image, three of which are on OpenSea 's rival Looks Rare for a total of 667,000. It is known that it was sold for dollars (about 76 million yen).

According to a survey by NFT's transaction information site DappRadar , the transaction volume in the last 7 days on OpenSea has decreased by 37% as of February 22, and the number of users has also decreased by 19%. In addition, while the trading volume of LooksRare has plummeted by nearly 65%, the trading volume of BloctoBay , which is a rival platform of OpenSea like LooksRare, has increased by more than 215%.

In a statement to the media, OpenSea said, 'There is a difference between the DappRadar data and the graphs featured in the press. It's hard to put conclusions in the headlines without any technical backing or comparison with other platforms. I'm irresponsible. See Dune Analytics for more accurate and complete data. '

Nadav Hollander, Chief Technology Officer at OpenSea, said, 'While the lessons of not publishing seed phrases and not sending unknown transactions are pervading, they are equally cautious about signing off-chain messages. It is necessary to do so, 'he said, reminding users of phishing scams.

6) Education on not sharing seed phrases or submitting unknown transactions has become more widespread in our space. However, signing off-chain messages requires equal consideration.

— Nadav Hollander (@NadavAHollander) February 20, 2022