Had just made a joke about this and it got me wondering: is this a dick move? Is it even legal? Nobody truly believes their wish will come true, right? That’s just free money sitting in the water. Or would most people these days consider them to be donations? I can only assume that someone has to clean them out every now and then so as not to become totally filled with coins. Who would keep it? The city? The private institution that owns the fountain (if in some corporate lobby area or something)? Is it donated to charity?
Secondary question: Is this even a tradition outside the US? How common around the world is throwing coins into wells or fountains and making a wish?
The most famous fountain for coin tossing/wish making is Trevi in Rome (and I wouldn’t be surprised if the whole concept came from there). You are legally forbidden from taking money back out of it there. The moment the coin sinks into the water, it belongs to the municipality, so taking it back out constitutes theft. The municipality is allowed (and indeed forced) to clear the coins from the fountain (otherwise there would be no water left after a while) and AFAIK they donate the cash for a good cause.