Any idea's for a rube Goldberg-style machine that puts coins in a bank?

You throw the coins in some kind of flat bottomed river and they float downstream then they get caught at the bottom and frozen together then launched with a catapult onto a life raft where it floats to a whirlpool and sinks eaten by a shark the shark is caught and gold found then the bigger ship sinks then treasure inters find it and put it into the bank