Such a great idea, I don't put money in mine, it's a dice hide. You could use it for your D&D treasure, loot notes, minis, dice, or hide your harribo in there!
The tin seals fairly securely, though if you had heaps of coins in there you might want to have it laying down.
The tin is cool, really solid, well made, and the image on the tin is really nice, the photos don't really do it justice.
This would make a perfect gift especially if you stashed dice or boosters in there!