Another way to ask this question is, what are the odds of any two people generating the same private key at any time?
The answer for this question is pretty interesting, but to make long story short, you have a better chance of winning the lotto 9 times in a row.
Bitcoin private keys uses SHA-256, which is the number 2 to the 256 power. Which is an unfathomably large number.
If you counted all the grains of sand on planet earth and all the drops of water in all the oceans on earth, you would not even come close to that number!
More detailed explanation:
https://www.youtube.com/watch?v=2eZ5DP2P5AsThis would be an effort in futility to guess as many numbers as private key of a Bitcoin hodler is beyond any human being, I don't think there would be any attempt by any human being to guess those numbers definitely unrealistic even randomly guessing those numbers can never lead to a private key of a hodler except utilizing a supercomputer which isn't in existence yet, even gamblers who play lotteries find it very difficult to win jackpot that requires guessing few members of 5 digits from one to hundred talkness of guessing a 64 digits of a private key of Bitcoin.