Regarding the solution for private keys facing quantum computer attacks:
① Use multiple signatures, and only one private key account has assets. The remaining private keys are only used for signature authentication. ② Each private key account has a daily login limit, and the first private key is the login object ③ For private keys that have logged in more than the limit on the same day, Bitcoin must be paid as the login cost for each subsequent login within the same day, and the paid Bitcoin will be destroyed immediately (quantum computers are used to destroy the value of Bitcoin, so paying Bitcoin for immediate destruction actually increases the value of Bitcoin) ④ For brute force cracking, a bankruptcy login cost must be paid, and brute force cracking by quantum computers will be meaningless. ⑤ If a private key is restricted, the private key owner only needs to change a private key to log in to avoid the login cost (it has no effect on the private key owner, but it limits the brute force cracking of quantum computers and ensures the security of the wallet)