I did something simular at one point. The problem is that the money are way to clothy. Money are light and relative stiff paper, so they want bend and flex like cloth as seen in the animation, most noticable when the bills hit the ground. I do not think the problem can be solved correctly yet.
I am trying to export the animation to Unreal, and as soon as I add the Cloth Bind, the Export Particles fails to convert the particles to meshes. Does anyone know what I am missing? Help!