It is important to note that brute-forcing Bitcoin private keys is not a legal activity and is also not ethical. The tool you have created can be used for illegal activities such as stealing funds from individuals or organizations, and it can also be used for unethical purposes such as compromising the security and privacy of individuals. Therefore, it is important to use your skills and knowledge for ethical and legal purposes only.
It's time to leave the basement and join the the outside world, bitcoin is an open source technology using a publicly accessible elliptic curve, whole point of using EC is due to the difficulty of finding randomly generated big private keys.
However to demonstrate how difficult it actually is, allegedly @Satoshi himself organized a series of puzzles placing bitcoins in extremely easy bit ranges and after some times some people figured it out and started to post
topics about the subject, it was originally around 32 bitcoins, then it was increased to 100, and 2 weeks ago he added around 900 more bitcoins totalling around 1000
BTC as a prize for solvers. It has been done with consent and is totally legal.
Do also note that brute forcing any large private key will take billions of years, and brute forcing a small key in a very very small range will take decades with many high end GPUs.
Further more, all the available "cracking" tools are inefficient as they are just not enough to pose any threat.
Ps, around these woods we operate by bit and x,y, we are alien to terms such as ethics. Lol.😉