Does spare change really matter? It can, if you take it seriously! Around our house, we use it as a sort of alternate emergency fund. Having large jugs of change sitting around is entertaining and fun when you go to cash it in. It’s a conversation piece, and a great way to teach kids to count if you have young ones at home. Five benefits of all that spare change: 1) If someone breaks in a heavy jug full of change is an effective weapon! It’s also an effective solution to an empty gas tank.