The founder of the Mining Pool describes the hacker's "stunning actions" after the Private Key leak.

[Coin World] A well-known founder of a mining pool recently expressed his views on a large amount of USDT theft incident. The story goes that he suspected his private key might have been leaked. To confirm whether his wallet address was indeed compromised, he conducted a bold test — he transferred 500 Bitcoins to that address. To his surprise, the hacker there “only” took away 490 Bitcoins, leaving him with 10 Bitcoins. In his words, although this amount of Bitcoin is not much, it is enough for a person to maintain a basic livelihood. This incident sounds a bit heartbreaking, but it reflects how important private key security is. Sometimes it's not that your assets are worthless, but a lapse in security awareness can cause tens of millions of dollars to change hands in an instant.