The best solutin

1 mill in coins from that specific height?

It's only around 22 pounds in $100 bills. If we assume they are perfectly stacked at optimum natural density and (a simplified because I don't have a science lab) terminal velocity of 13.663 meters/sec^2, then the force would be about... 136.63 newtons of force. It might feel like a small book landed on your thigh. I was really expecting more tbh. I was hoping for a shattered femur or a crushed skull. Now, if it was a billion dollars, then you would have a 2.61 x 6.14 bloody rectangular hole in your leg. And the ground.

Its is Sheldon big bang theory in life form

I just have nothing to do except do math and watch boobs bounce at night. I didn't intend on watching boobs, but this post is hypnotic: https://funsubstance.com/fun/474322/that-look-to-the-camera/?ref=prandom

If I remember correctly there's no height at which a singular coin could reach a speed higher enough to kill you if dropped. It would at most do a bit f flesh damage