The birthday problem means that the number of values you have to choose to have a 50% chance of a collision scales approximately with the square root of the size of the space. [0]
2^(256/2) is way, way bigger than the number of used bitcoin addresses, which is about 33 million according to this csv [1].
2^(256/2) is way, way bigger than the number of used bitcoin addresses, which is about 33 million according to this csv [1].
[0] https://en.wikipedia.org/wiki/Birthday_attack#Mathematics
[1] https://bitkeys.work/download.php