Male, 20 and a half.
I'm a delivery driver and I often get tips or petrol money paid in pound coins. I'm too lazy to take them to the bank and there are too many of them to carry around and spend, so I got a treasure chest.
There's £485 in there. ($736.23)
I wouldn't mind if my housemates needed to borrow some for any reason. I've known them long enough to help them out with a month's rent if necessary, although I don't know what the landlord would say to being paid with a sack of gold. But the key word here is
borrow. And vice versa, if I was in this situation I'd take the change, but I would let them know and I'd give it back to them at some point. The scenario you've described sounds like "I have less money than him, so I'm going to take some of his money," which at that point is just stealing. It's only ok if you need it for something specific. If the guy hasn't been keeping track of how much is in there then just taking it probably isn't going to hurt him, but how do you know whether he's kept count or not? I have.
Having said all that, I keep my room locked, the box is locked, and the floor of my bedroom is strewn with broken glass which I haven't bothered to clean up because, hey, I know where it is. If my housemates wanted the money they would have to ask for practical rather than moral reasons.
Also, as I know full well that nothing on the internet is truly anonymous, that shit is going to the bank tomorrow morning.