Your point about the coin hitting other things to be more unpredictable reminded me of an interesting blog post[1] about generating cryptographically secure ran

Your point about the coin hitting other things to be more unpredictable reminded me of an interesting blog post[1] about generating cryptographically secure random numbers. The memorable part for me is the suggestion of using five coins of different shapes and sizes so they get shaken a consistent number of times in a large cup. [1]: https://blog.sia.tech/generating-cryptographically-secure-random-numbers-with-coins-and-a-cup-4e223899509e https://blog.sia.tech/generating-cryptographically-secure-ra...