F2Pool co-founder Wang Chun once transferred 500 bitcoins to a suspicious address to test the security of his private key, only to lose 490 bitcoins in the process.

PANews reported on December 21 that, regarding the widely discussed "50 million USDT phishing attack," F2Pool co-founder Wang Chun (@satofishi) tweeted, "Last year, I suspected my private key had been compromised. To confirm whether the address had indeed been stolen, I transferred 500 bitcoins to it. To my surprise, the hacker 'generously' only took 490 bitcoins, leaving me with 10 bitcoins, enough to make a living."