For control freaks who need to precisely choreograph the coin's death... here's an all manual approach, made easy with bones:
CoinRoll_600.mov
mp4 version:
CoinRoll_600.mp4
RollingCoin03.prj
the "Ground level" bone moves the coin around the center.
The "axis" bone is a child of the "Ground level" bone and is the axis of the coin and has two poses. One pose keeps it tilted toward the origin of the "Ground level" bone. The other is a slider that moves it closer to the origin of the "Ground level" bone.
I only had to make keyframes at the beginning and the end:
the "Ground level" bone turns 1440°, 4 revolutions
the "axis" bone is spun on Z to make the coin "roll" ( I just eyeballed it quickly, it's not exact here.)
the slider moves from 0 to 100 % to move the coin closer to the center.