I'm going to threaten my dad with theft
Are you serious? Why do you want to steal from your parent?
Because he lives in a pretty rich neighbourhood and I'm sure no one will miss such small amount.
Regardless, you should never steal from your parent! You should show respect for the people responsible for bring you into the world.
He doesn't care about me anyway, so he won't even notice the small amount missing.
It doesn't matter, it's illegal to steal from anyone and it's definitely wrong to do it with a parent. You should just drop the idea.