I keep an ever increasing stash of coins that I'm reluctant to use. You might ask me "why not use them retard?", well, the last time I went and bought something with a lot of coins and had the cashier deal with them, 3 days after I had another cashier from a completely different place give me my change as a huge pile of the lowest denomination of coins. Those motherfuckers have a network and they talk to each other, I'm not risking being the target of their revenge once again.