If it can be done then we are out of business, Bitcoin private key cannot be a brute force just like you will just waste your time and money doing this, and what is the purpose of getting a private key, only black hat hackers do such thing Bitcoin was created to be perfectly like this
I agree with you, as I am going through all the responses on this thread I am becoming scared of keeping my bitcoin in my wallet, it means someone can wake up and have access to anyone wallet at any time.