Quote from: headingnorth on Today at 09:32:49 PM

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=2eZ5DP2P5As

I have not viewed the video link but what I will state is that if the chances of winning the lottery 9 times consecutive and the grains of sand and drops of water on earth are true, then that would explain why (as far as I know) nobody has ever claimed they lost their funds as a result of duplicated private keys.

Quote from: Bananington on Today at 09:43:10 PM

The odds would be zero I must say, because the private keys are auto generated, unless you change them to popular phrases you can remember or know with a group of people just like a mime, it would be very difficult, if not impossible for anyone to guess someone's private key or seed phrase.

There are numerical chances of it happening but it is virtually impossible for such an event to take place.