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.

F2Pool co-founder Wang Chun revealed that he once transferred 500 bitcoins to a suspicious address to test the security of his private key. The hacker only took 490 bitcoins, leaving 10 for him to "make a living".