There's just some really generous, selfless, gorgeous people out there who want to help the world, but remain anonymous.
That's very interesting. This is the first I have heard of a slabbed coin being donated this way..or an ancient.
Seem like you run the risk of it not being identified, and just deposited. I wouldn't just drop it in a kettle.
I agree dangerous if you do anything that is close in size to any current coin such as a half eagle being deposited in a nickel roll (although some coin roll hunter will have the find of a life time)